Remove some redundant entity clones (#36274)

`cx.entity()` already returns an owned entity, so there is no need for
these clones.

Release Notes:

- N/A

crates/zed/src/zed.rs

@@ -319,7 +319,7 @@ pub fn initialize_workspace(
             return;
         };
 
-        let workspace_handle = cx.entity().clone();
+        let workspace_handle = cx.entity();
         let center_pane = workspace.active_pane().clone();
         initialize_pane(workspace, &center_pane, window, cx);