revert source connection monitor

client/lib/source/ws-source.ts

@@ -5,7 +5,6 @@ import { Source } from './source'
 
 export class WebsocketSource<T> implements Source<T> {
   private websocket$: WebSocketSubject<Update<T>> | undefined
-  connectionMade$ = new Subject<void>()
 
   constructor (
     private readonly url: string,
@@ -16,7 +15,6 @@ export class WebsocketSource<T> implements Source<T> {
       url: this.url,
       openObserver: {
         next: () => {
-          this.connectionMade$.next()
           this.websocket$!.next(document.cookie as any)
         },
       },