zeta: Improve UX for simultaneous LSP and prediction completions (#24024)

Release Notes:

- N/A

---------

Co-authored-by: Michael Sloan <michael@zed.dev>
Co-authored-by: Danilo <danilo@zed.dev>
Co-authored-by: Richard <richard@zed.dev>

crates/editor/src/display_map.rs

@@ -508,7 +508,7 @@ impl DisplayMap {
 
     pub(crate) fn splice_inlays(
         &mut self,
-        to_remove: Vec<InlayId>,
+        to_remove: &[InlayId],
         to_insert: Vec<Inlay>,
         cx: &mut Context<Self>,
     ) {