chore: Fix several style lints (#17488)

It's not comprehensive enough to start linting on `style` group, but
hey, it's a start.

Release Notes:

- N/A

crates/context_servers/src/client.rs

@@ -235,13 +235,13 @@ impl Client {
             let content = buffer.trim();
 
             if !content.is_empty() {
-                if let Ok(response) = serde_json::from_str::<AnyResponse>(&content) {
+                if let Ok(response) = serde_json::from_str::<AnyResponse>(content) {
                     if let Some(handlers) = response_handlers.lock().as_mut() {
                         if let Some(handler) = handlers.remove(&response.id) {
                             handler(Ok(content.to_string()));
                         }
                     }
-                } else if let Ok(notification) = serde_json::from_str::<AnyNotification>(&content) {
+                } else if let Ok(notification) = serde_json::from_str::<AnyNotification>(content) {
                     let mut notification_handlers = notification_handlers.lock();
                     if let Some(handler) =
                         notification_handlers.get_mut(notification.method.as_str())

crates/context_servers/src/context_servers.rs

@@ -1,5 +1,4 @@
 use gpui::{actions, AppContext, Context, ViewContext};
-use log;
 use manager::ContextServerManager;
 use workspace::Workspace;
 
@@ -27,7 +26,7 @@ pub fn init(cx: &mut AppContext) {
 }
 
 fn restart_servers(_workspace: &mut Workspace, _action: &Restart, cx: &mut ViewContext<Workspace>) {
-    let model = ContextServerManager::global(&cx);
+    let model = ContextServerManager::global(cx);
     cx.update_model(&model, |manager, cx| {
         for server in manager.servers() {
             manager

crates/context_servers/src/manager.rs

@@ -125,6 +125,12 @@ pub enum Event {
 impl Global for ContextServerManager {}
 impl EventEmitter<Event> for ContextServerManager {}
 
+impl Default for ContextServerManager {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl ContextServerManager {
     pub fn new() -> Self {
         Self {