refactor: remove unnecessary checks (#6777)

src/client/actions/TypingStart.js

@@ -7,16 +7,15 @@ const { Events, TextBasedChannelTypes } = require('../../util/Constants');
 class TypingStart extends Action {
   handle(data) {
     const channel = this.getChannel(data);
-    if (!channel) {
-      return;
-    }
+    if (!channel) return;
+
     if (!TextBasedChannelTypes.includes(channel.type)) {
       this.client.emit(Events.WARN, `Discord sent a typing packet to a ${channel.type} channel ${channel.id}`);
       return;
     }
 
     const user = this.getUserFromMember(data);
-    if (channel && user) {
+    if (user) {
       /**
        * Emitted whenever a user starts typing in a channel.
        * @event Client#typingStart