Minimize app dependency on platform service (#21548)

app/server.go

@@ -287,7 +287,7 @@ func NewServer(options ...Option) (*Server, error) {
 	// It is important to initialize the hub only after the global logger is set
 	// to avoid race conditions while logging from inside the hub.
 	// Step 5: Start hub in platform which the hub depends on s.Channels() (step 4)
-	s.platform.Start(New(ServerConnector(s.Channels())))
+	s.platform.Start()
 
 	// -------------------------------------------------------------------------
 	// Everything below this is not order sensitive and safe to be moved around.