Remove dead & duplicated code (#11405)

* Remove dead code

* Make dead code happier

* DRY pickle additional data calculation

* Iterate

src/stores/widgets/StopGapWidget.ts

@@ -242,10 +242,6 @@ export class StopGapWidget extends EventEmitter {
         return parsed.toString().replace(/%24/g, "$");
     }
 
-    public get isManagedByManager(): boolean {
-        return !!this.scalarToken;
-    }
-
     public get started(): boolean {
         return !!this.messaging;
     }

src/stores/widgets/StopGapWidgetDriver.ts

@@ -245,7 +245,7 @@ export class StopGapWidgetDriver extends WidgetDriver {
 
         if (!client || !roomId) throw new Error("Not in a room or not attached to a client");
 
-        let r: { event_id: string } | null = null; // eslint-disable-line camelcase
+        let r: { event_id: string } | null;
         if (stateKey !== null) {
             // state event
             r = await client.sendStateEvent(roomId, eventType, content, stateKey);