Gateway: Deprecated OP chan API, use PacerLoop.Extras instead

gateway/gateway.go

@@ -98,12 +98,6 @@ type Gateway struct {
 	// reconnections or any type of connection interruptions.
 	AfterClose func(err error) // noop by default
 
-	// Only use for debugging
-
-	// If this channel is non-nil, all incoming OP packets will also be sent
-	// here. This should be buffered, so to not block the main loop.
-	OP chan *wsutil.OP
-
 	// Mutex to hold off calls when the WS is not available. Doesn't block if
 	// Start() is not called or Close() is called. Also doesn't block for
 	// Identify or Resume.

gateway/op.go

@@ -30,10 +30,6 @@ const (
 )
 
 func (g *Gateway) HandleOP(op *wsutil.OP) error {
-	if g.OP != nil {
-		g.OP <- op
-	}
-
 	switch op.Code {
 	case HeartbeatAckOP:
 		// Heartbeat from the server?