chore: remove bad upgrade code

src/index.js

@@ -162,7 +162,6 @@ class Bot extends Client {
 			this.setMaxListeners(this.config.max_listeners); // set the max listeners for each event
 
 			require('./update/notifier')(this); // check for updates
-			require('./update/upgrade')(this); // upgrade
 
 			const listeners = new ListenerLoader(this);
 			listeners.load(); // load listeners