Remove unneeded anonymous lifetimes from gpui::Context (#27686)

This PR removes a number of unneeded anonymous lifetimes from usages of
`gpui::Context`.

Release Notes:

- N/A

crates/remote_server/src/unix.rs

@@ -848,7 +848,7 @@ pub fn handle_settings_file_changes(
     .detach();
 }
 
-fn read_proxy_settings(cx: &mut Context<'_, HeadlessProject>) -> Option<Uri> {
+fn read_proxy_settings(cx: &mut Context<HeadlessProject>) -> Option<Uri> {
     let proxy_str = ProxySettings::get_global(cx).proxy.to_owned();
     let proxy_url = proxy_str
         .as_ref()