diff --git a/crates/gpui/src/platform/linux/platform.rs b/crates/gpui/src/platform/linux/platform.rs
index 696421714b..bd519a098d 100644
--- a/crates/gpui/src/platform/linux/platform.rs
+++ b/crates/gpui/src/platform/linux/platform.rs
@@ -35,9 +35,9 @@ use crate::platform::linux::wayland::WaylandClient;
 use crate::{
     px, Action, AnyWindowHandle, BackgroundExecutor, ClipboardItem, CosmicTextSystem, CursorStyle,
     DisplayId, ForegroundExecutor, Keymap, Keystroke, LinuxDispatcher, Menu, Modifiers,
-    PathPromptOptions, Pixels, Platform, PlatformDisplay, PlatformInput, PlatformInputHandler,
-    PlatformTextSystem, PlatformWindow, Point, PromptLevel, Result, SemanticVersion, Size, Task,
-    WindowAppearance, WindowOptions, WindowParams,
+    PathPromptOptions, Pixels, Platform, PlatformDisplay, PlatformInputHandler, PlatformTextSystem,
+    PlatformWindow, Point, PromptLevel, Result, SemanticVersion, Size, Task, WindowAppearance,
+    WindowOptions, WindowParams,
 };
 
 use super::x11::X11Client;
@@ -72,11 +72,8 @@ pub trait LinuxClient {
 #[derive(Default)]
 pub(crate) struct PlatformHandlers {
     pub(crate) open_urls: Option<Box<dyn FnMut(Vec<String>)>>,
-    pub(crate) become_active: Option<Box<dyn FnMut()>>,
-    pub(crate) resign_active: Option<Box<dyn FnMut()>>,
     pub(crate) quit: Option<Box<dyn FnMut()>>,
     pub(crate) reopen: Option<Box<dyn FnMut()>>,
-    pub(crate) event: Option<Box<dyn FnMut(PlatformInput) -> bool>>,
     pub(crate) app_menu_action: Option<Box<dyn FnMut(&dyn Action)>>,
     pub(crate) will_open_app_menu: Option<Box<dyn FnMut()>>,
     pub(crate) validate_app_menu_command: Option<Box<dyn FnMut(&dyn Action) -> bool>>,
diff --git a/crates/gpui/src/platform/linux/wayland/window.rs b/crates/gpui/src/platform/linux/wayland/window.rs
index adecc089b4..7848a9b284 100644
--- a/crates/gpui/src/platform/linux/wayland/window.rs
+++ b/crates/gpui/src/platform/linux/wayland/window.rs
@@ -37,7 +37,6 @@ pub(crate) struct Callbacks {
     input: Option<Box<dyn FnMut(crate::PlatformInput) -> crate::DispatchEventResult>>,
     active_status_change: Option<Box<dyn FnMut(bool)>>,
     resize: Option<Box<dyn FnMut(Size<Pixels>, f32)>>,
-    fullscreen: Option<Box<dyn FnMut(bool)>>,
     moved: Option<Box<dyn FnMut()>>,
     should_close: Option<Box<dyn FnMut() -> bool>>,
     close: Option<Box<dyn FnOnce()>>,
@@ -480,11 +479,6 @@ impl WaylandWindowStatePtr {
     pub fn set_fullscreen(&self, fullscreen: bool) {
         let mut state = self.state.borrow_mut();
         state.fullscreen = fullscreen;
-
-        let mut callbacks = self.callbacks.borrow_mut();
-        if let Some(ref mut fun) = callbacks.fullscreen {
-            fun(fullscreen)
-        }
     }
 
     /// Notifies the window of the state of the decorations.
diff --git a/crates/gpui/src/platform/linux/x11/window.rs b/crates/gpui/src/platform/linux/x11/window.rs
index d5adb5fe91..1f23dcd959 100644
--- a/crates/gpui/src/platform/linux/x11/window.rs
+++ b/crates/gpui/src/platform/linux/x11/window.rs
@@ -147,7 +147,6 @@ pub struct Callbacks {
     input: Option<Box<dyn FnMut(PlatformInput) -> crate::DispatchEventResult>>,
     active_status_change: Option<Box<dyn FnMut(bool)>>,
     resize: Option<Box<dyn FnMut(Size<Pixels>, f32)>>,
-    fullscreen: Option<Box<dyn FnMut(bool)>>,
     moved: Option<Box<dyn FnMut()>>,
     should_close: Option<Box<dyn FnMut() -> bool>>,
     close: Option<Box<dyn FnOnce()>>,
diff --git a/crates/gpui/src/platform/mac/platform.rs b/crates/gpui/src/platform/mac/platform.rs
index d541d78e81..32d49cccbd 100644
--- a/crates/gpui/src/platform/mac/platform.rs
+++ b/crates/gpui/src/platform/mac/platform.rs
@@ -2,8 +2,8 @@ use super::{events::key_to_native, BoolExt};
 use crate::{
     Action, AnyWindowHandle, BackgroundExecutor, ClipboardItem, CursorStyle, ForegroundExecutor,
     Keymap, MacDispatcher, MacDisplay, MacTextSystem, MacWindow, Menu, MenuItem, PathPromptOptions,
-    Platform, PlatformDisplay, PlatformInput, PlatformTextSystem, PlatformWindow, Result,
-    SemanticVersion, Task, WindowAppearance, WindowParams,
+    Platform, PlatformDisplay, PlatformTextSystem, PlatformWindow, Result, SemanticVersion, Task,
+    WindowAppearance, WindowParams,
 };
 use anyhow::{anyhow, bail};
 use block::ConcreteBlock;
@@ -65,10 +65,6 @@ unsafe fn build_classes() {
     APP_CLASS = {
         let mut decl = ClassDecl::new("GPUIApplication", class!(NSApplication)).unwrap();
         decl.add_ivar::<*mut c_void>(MAC_PLATFORM_IVAR);
-        decl.add_method(
-            sel!(sendEvent:),
-            send_event as extern "C" fn(&mut Object, Sel, id),
-        );
         decl.register()
     };
 
@@ -83,14 +79,6 @@ unsafe fn build_classes() {
             sel!(applicationShouldHandleReopen:hasVisibleWindows:),
             should_handle_reopen as extern "C" fn(&mut Object, Sel, id, bool),
         );
-        decl.add_method(
-            sel!(applicationDidBecomeActive:),
-            did_become_active as extern "C" fn(&mut Object, Sel, id),
-        );
-        decl.add_method(
-            sel!(applicationDidResignActive:),
-            did_resign_active as extern "C" fn(&mut Object, Sel, id),
-        );
         decl.add_method(
             sel!(applicationWillTerminate:),
             will_terminate as extern "C" fn(&mut Object, Sel, id),
@@ -151,11 +139,8 @@ pub(crate) struct MacPlatformState {
     pasteboard: id,
     text_hash_pasteboard_type: id,
     metadata_pasteboard_type: id,
-    become_active: Option<Box<dyn FnMut()>>,
-    resign_active: Option<Box<dyn FnMut()>>,
     reopen: Option<Box<dyn FnMut()>>,
     quit: Option<Box<dyn FnMut()>>,
-    event: Option<Box<dyn FnMut(PlatformInput) -> bool>>,
     menu_command: Option<Box<dyn FnMut(&dyn Action)>>,
     validate_menu_command: Option<Box<dyn FnMut(&dyn Action) -> bool>>,
     will_open_menu: Option<Box<dyn FnMut()>>,
@@ -181,11 +166,8 @@ impl MacPlatform {
             pasteboard: unsafe { NSPasteboard::generalPasteboard(nil) },
             text_hash_pasteboard_type: unsafe { ns_string("zed-text-hash") },
             metadata_pasteboard_type: unsafe { ns_string("zed-metadata") },
-            become_active: None,
-            resign_active: None,
             reopen: None,
             quit: None,
-            event: None,
             menu_command: None,
             validate_menu_command: None,
             will_open_menu: None,
@@ -1040,24 +1022,6 @@ unsafe fn get_mac_platform(object: &mut Object) -> &MacPlatform {
     &*(platform_ptr as *const MacPlatform)
 }
 
-extern "C" fn send_event(this: &mut Object, _sel: Sel, native_event: id) {
-    unsafe {
-        if let Some(event) = PlatformInput::from_native(native_event, None) {
-            let platform = get_mac_platform(this);
-            let mut lock = platform.0.lock();
-            if let Some(mut callback) = lock.event.take() {
-                drop(lock);
-                let result = callback(event);
-                platform.0.lock().event.get_or_insert(callback);
-                if !result {
-                    return;
-                }
-            }
-        }
-        msg_send![super(this, class!(NSApplication)), sendEvent: native_event]
-    }
-}
-
 extern "C" fn did_finish_launching(this: &mut Object, _: Sel, _: id) {
     unsafe {
         let app: id = msg_send![APP_CLASS, sharedApplication];
@@ -1082,26 +1046,6 @@ extern "C" fn should_handle_reopen(this: &mut Object, _: Sel, _: id, has_open_wi
     }
 }
 
-extern "C" fn did_become_active(this: &mut Object, _: Sel, _: id) {
-    let platform = unsafe { get_mac_platform(this) };
-    let mut lock = platform.0.lock();
-    if let Some(mut callback) = lock.become_active.take() {
-        drop(lock);
-        callback();
-        platform.0.lock().become_active.get_or_insert(callback);
-    }
-}
-
-extern "C" fn did_resign_active(this: &mut Object, _: Sel, _: id) {
-    let platform = unsafe { get_mac_platform(this) };
-    let mut lock = platform.0.lock();
-    if let Some(mut callback) = lock.resign_active.take() {
-        drop(lock);
-        callback();
-        platform.0.lock().resign_active.get_or_insert(callback);
-    }
-}
-
 extern "C" fn will_terminate(this: &mut Object, _: Sel, _: id) {
     let platform = unsafe { get_mac_platform(this) };
     let mut lock = platform.0.lock();
diff --git a/crates/gpui/src/platform/mac/window.rs b/crates/gpui/src/platform/mac/window.rs
index c1d6e4afc3..570eb9024a 100644
--- a/crates/gpui/src/platform/mac/window.rs
+++ b/crates/gpui/src/platform/mac/window.rs
@@ -259,14 +259,6 @@ unsafe fn build_window_class(name: &'static str, superclass: &Class) -> *const C
         sel!(windowDidChangeOcclusionState:),
         window_did_change_occlusion_state as extern "C" fn(&Object, Sel, id),
     );
-    decl.add_method(
-        sel!(windowWillEnterFullScreen:),
-        window_will_enter_fullscreen as extern "C" fn(&Object, Sel, id),
-    );
-    decl.add_method(
-        sel!(windowWillExitFullScreen:),
-        window_will_exit_fullscreen as extern "C" fn(&Object, Sel, id),
-    );
     decl.add_method(
         sel!(windowDidMove:),
         window_did_move as extern "C" fn(&Object, Sel, id),
@@ -340,7 +332,6 @@ struct MacWindowState {
     event_callback: Option<Box<dyn FnMut(PlatformInput) -> crate::DispatchEventResult>>,
     activate_callback: Option<Box<dyn FnMut(bool)>>,
     resize_callback: Option<Box<dyn FnMut(Size<Pixels>, f32)>>,
-    fullscreen_callback: Option<Box<dyn FnMut(bool)>>,
     moved_callback: Option<Box<dyn FnMut()>>,
     should_close_callback: Option<Box<dyn FnMut() -> bool>>,
     close_callback: Option<Box<dyn FnOnce()>>,
@@ -632,7 +623,6 @@ impl MacWindow {
                 event_callback: None,
                 activate_callback: None,
                 resize_callback: None,
-                fullscreen_callback: None,
                 moved_callback: None,
                 should_close_callback: None,
                 close_callback: None,
@@ -1476,24 +1466,6 @@ extern "C" fn window_did_resize(this: &Object, _: Sel, _: id) {
     window_state.as_ref().lock().move_traffic_light();
 }
 
-extern "C" fn window_will_enter_fullscreen(this: &Object, _: Sel, _: id) {
-    window_fullscreen_changed(this, true);
-}
-
-extern "C" fn window_will_exit_fullscreen(this: &Object, _: Sel, _: id) {
-    window_fullscreen_changed(this, false);
-}
-
-fn window_fullscreen_changed(this: &Object, is_fullscreen: bool) {
-    let window_state = unsafe { get_window_state(this) };
-    let mut lock = window_state.as_ref().lock();
-    if let Some(mut callback) = lock.fullscreen_callback.take() {
-        drop(lock);
-        callback(is_fullscreen);
-        window_state.lock().fullscreen_callback = Some(callback);
-    }
-}
-
 extern "C" fn window_did_move(this: &Object, _: Sel, _: id) {
     let window_state = unsafe { get_window_state(this) };
     let mut lock = window_state.as_ref().lock();
diff --git a/crates/gpui/src/platform/windows/platform.rs b/crates/gpui/src/platform/windows/platform.rs
index 5e363614b9..7f8ec438a3 100644
--- a/crates/gpui/src/platform/windows/platform.rs
+++ b/crates/gpui/src/platform/windows/platform.rs
@@ -90,11 +90,8 @@ impl WindowsPlatformInner {
 #[derive(Default)]
 struct Callbacks {
     open_urls: Option<Box<dyn FnMut(Vec<String>)>>,
-    become_active: Option<Box<dyn FnMut()>>,
-    resign_active: Option<Box<dyn FnMut()>>,
     quit: Option<Box<dyn FnMut()>>,
     reopen: Option<Box<dyn FnMut()>>,
-    event: Option<Box<dyn FnMut(PlatformInput) -> bool>>,
     app_menu_action: Option<Box<dyn FnMut(&dyn Action)>>,
     will_open_app_menu: Option<Box<dyn FnMut()>>,
     validate_app_menu_command: Option<Box<dyn FnMut(&dyn Action) -> bool>>,
diff --git a/crates/gpui/src/platform/windows/window.rs b/crates/gpui/src/platform/windows/window.rs
index cdf8c6cb1b..9aa44989a9 100644
--- a/crates/gpui/src/platform/windows/window.rs
+++ b/crates/gpui/src/platform/windows/window.rs
@@ -1223,7 +1223,6 @@ struct Callbacks {
     input: Option<Box<dyn FnMut(crate::PlatformInput) -> DispatchEventResult>>,
     active_status_change: Option<Box<dyn FnMut(bool)>>,
     resize: Option<Box<dyn FnMut(Size<Pixels>, f32)>>,
-    fullscreen: Option<Box<dyn FnMut(bool)>>,
     moved: Option<Box<dyn FnMut()>>,
     should_close: Option<Box<dyn FnMut() -> bool>>,
     close: Option<Box<dyn FnOnce()>>,