Fix deadlock on requester shutdown during login

src/main/java/net/dv8tion/jda/internal/JDAImpl.java

@@ -758,8 +758,7 @@ public synchronized void shutdownInternals()
         guildSetupController.close();
 
         // stop accepting new requests
-        if (requester.stop()) // returns true if no more requests will be executed
-            shutdownRequester(); // in that case shutdown entirely
+        requester.stop(); // the requester calls shutdownRequester when its done
         threadConfig.shutdown();
 
         if (shutdownHook != null)
@@ -774,7 +773,7 @@ public synchronized void shutdownInternals()
         setStatus(Status.SHUTDOWN);
     }
 
-    public synchronized void shutdownRequester()
+    public void shutdownRequester()
     {
         // Stop all request processing
         requester.shutdown();