Revert "Use scap library to implement screensharing on X11 (#27807)" (#28141)

This reverts commit c2afc2271b.

Build on ARM if failing, likely because `c_char` is `u8` on arm and `i8`
on x86:

```
error[E0308]: mismatched types
   --> /home/runner/.cargo/git/checkouts/scap-40ad33e1dd47aaea/5715067/src/targets/linux/mod.rs:75:74
    |
75  |     let result = unsafe { XmbTextPropertyToTextList(display, &mut xname, &mut list, &mut count) };
    |                           -------------------------                      ^^^^^^^^^ expected `*mut *mut *mut u8`, found `&mut *mut *mut i8`
    |                           |
    |                           arguments to this function are incorrect
    |
    = note:    expected raw pointer `*mut *mut *mut u8`
            found mutable reference `&mut *mut *mut i8`
note: function defined here
   --> /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/x11-2.21.0/src/xlib.rs:552:10
    |
552 |   pub fn XmbTextPropertyToTextList (_4: *mut Display, _3: *const XTextProperty, _2: *mut *mut *mut c_char, _1: *mut c_int) -> c_int,
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^
```

Release Notes:

- N/A

crates/gpui/src/platform/linux/wayland/client.rs

@@ -7,7 +7,6 @@ use std::{
     time::{Duration, Instant},
 };
 
-use anyhow::anyhow;
 use calloop::{
     EventLoop, LoopHandle,
     timer::{TimeoutAction, Timer},
@@ -15,7 +14,7 @@ use calloop::{
 use calloop_wayland_source::WaylandSource;
 use collections::HashMap;
 use filedescriptor::Pipe;
-use futures::channel::oneshot;
+
 use http_client::Url;
 use smallvec::SmallVec;
 use util::ResultExt;
@@ -86,8 +85,7 @@ use crate::{
     FileDropEvent, ForegroundExecutor, KeyDownEvent, KeyUpEvent, Keystroke, LinuxCommon, Modifiers,
     ModifiersChangedEvent, MouseButton, MouseDownEvent, MouseExitEvent, MouseMoveEvent,
     MouseUpEvent, NavigationDirection, Pixels, PlatformDisplay, PlatformInput, Point, SCROLL_LINES,
-    ScaledPixels, ScreenCaptureSource, ScrollDelta, ScrollWheelEvent, Size, TouchPhase,
-    WindowParams, point, px, size,
+    ScaledPixels, ScrollDelta, ScrollWheelEvent, Size, TouchPhase, WindowParams, point, px, size,
 };
 
 /// Used to convert evdev scancode to xkb scancode
@@ -635,24 +633,6 @@ impl LinuxClient for WaylandClient {
         None
     }
 
-    fn is_screen_capture_supported(&self) -> bool {
-        false
-    }
-
-    fn screen_capture_sources(
-        &self,
-    ) -> oneshot::Receiver<anyhow::Result<Vec<Box<dyn ScreenCaptureSource>>>> {
-        // TODO: Get screen capture working on wayland. Be sure to try window resizing as that may
-        // be tricky.
-        //
-        // start_scap_default_target_source()
-        let (sources_tx, sources_rx) = oneshot::channel();
-        sources_tx
-            .send(Err(anyhow!("Wayland screen capture not yet implemented.")))
-            .ok();
-        sources_rx
-    }
-
     fn open_window(
         &self,
         handle: AnyWindowHandle,