somehow accidentally left this in

frontend/src/tabs-hook.tsx

@@ -23,7 +23,6 @@ class TabsHook extends Logger {
   tabs: Tab[] = [];
   private qAMRoot?: any;
   private qamPatch?: Patch;
-  private unsubscribeSecurity?: () => void;
 
   constructor() {
     super('TabsHook');
@@ -114,7 +113,6 @@ class TabsHook extends Logger {
   deinit() {
     this.qamPatch?.unpatch();
     this.qAMRoot.return.alternate.type = this.qAMRoot.return.type;
-    this.unsubscribeSecurity?.();
   }
 
   add(tab: Tab) {