chore: Cleanup

src/shell/element/stack.rs

@@ -56,7 +56,6 @@ use smithay::{
 };
 use std::{
     borrow::Cow,
-    cell::RefCell,
     fmt,
     hash::Hash,
     sync::{

src/shell/mod.rs

@@ -649,7 +649,7 @@ impl Workspaces {
             return;
         }
 
-        if let Some(set) = self.sets.remove(output) {
+        if let Some(set) = self.sets.shift_remove(output) {
             {
                 let map = layer_map_for_output(output);
                 for surface in map.layers() {