rpcsrv: drop ws from subscriber

Subscribers can be local as well and no one uses this field anyway.

pkg/services/rpcsrv/server.go

@@ -470,7 +470,7 @@ func (s *Server) handleHTTPRequest(w http.ResponseWriter, httpRequest *http.Requ
 		}
 		resChan := make(chan abstractResult) // response.abstract or response.abstractBatch
 		subChan := make(chan intEvent, notificationBufSize)
-		subscr := &subscriber{writer: subChan, ws: ws}
+		subscr := &subscriber{writer: subChan}
 		s.subsLock.Lock()
 		s.subscribers[subscr] = true
 		s.subsLock.Unlock()

pkg/services/rpcsrv/subscription.go

@@ -17,7 +17,6 @@ type (
 	// subscriber is an event subscriber.
 	subscriber struct {
 		writer    chan<- intEvent
-		ws        *websocket.Conn
 		overflown atomic.Bool
 		// These work like slots as there is not a lot of them (it's
 		// cheaper doing it this way rather than creating a map),