fixup! fix(cdk-experimental/combobox): refactor combobox filtering

Author: wagnermaciel

src/cdk-experimental/ui-patterns/listbox/option.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.dev/license
  */
 
-import {computed, signal} from '@angular/core';
+import {computed} from '@angular/core';
 import {SignalLike} from '../behaviors/signal-like/signal-like';
 import {List, ListInputs, ListItem} from '../behaviors/list/list';