[DeadCode] Clean up unnecessary reindex use on RemoveUnusedClosureVariableUseRector (#7433)

Author: samsonasik

rules/DeadCode/Rector/Closure/RemoveUnusedClosureVariableUseRector.php

@@ -88,8 +88,6 @@ public function refactor(Node $node): ?Node
         }
 
         if ($hasChanged) {
-            // reset keys, to keep as expected
-            $node->uses = array_values($node->uses);
             return $node;
         }