refactor(GuildChannel): simplify constructor (#9499)

packages/discord.js/src/structures/GuildChannel.js

@@ -20,7 +20,7 @@ const PermissionsBitField = require('../util/PermissionsBitField');
  */
 class GuildChannel extends BaseChannel {
   constructor(guild, data, client, immediatePatch = true) {
-    super(guild?.client ?? client, data, false);
+    super(client, data, false);
 
     /**
      * The guild the channel is in
@@ -33,8 +33,6 @@ class GuildChannel extends BaseChannel {
      * @type {Snowflake}
      */
     this.guildId = guild?.id ?? data.guild_id;
-
-    this.parentId = this.parentId ?? null;
     /**
      * A manager of permission overwrites that belong to this channel
      * @type {PermissionOverwriteManager}
@@ -73,6 +71,8 @@ class GuildChannel extends BaseChannel {
        * @type {?Snowflake}
        */
       this.parentId = data.parent_id;
+    } else {
+      this.parentId ??= null;
     }
 
     if ('permission_overwrites' in data) {