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/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