zed: Remove unnecessary clones (#29513)

`App::http_client` and `Client::http_client` both return an owned `Arc`
which it clones internally. This means we can remove unnecessary clones
when calling these methods.

Release Notes:

- N/A

crates/extension_host/src/extension_host.rs

@@ -193,8 +193,8 @@ pub fn init(
             None,
             extension_host_proxy,
             fs,
-            client.http_client().clone(),
-            client.http_client().clone(),
+            client.http_client(),
+            client.http_client(),
             Some(client.telemetry().clone()),
             node_runtime,
             cx,