refactor: remove user bot methods (#2559)

* [WIP] Remove user bots

* more backend userbot removal

* Add mfaEnabled back

* revert client presences store removal

* partially revert getAuth changes

* remove more no longer used children of ClientUserGuildSettings

* fix a bug with this pr and TextBasedChannel.applyToClass

* remove a syncGuilds reference

* more user bot data handling

* various guildSync cleanup

* bots can't call logout

Had the user/bot portions of the code mixed up. Though, does this need to be a promise anymore?

* make ClientManager#destroy() sync

It nolonger needs to be a promise, and nothing depended on it being a promise that I can tell.

* requested change

* Fix massive error

* no longer used as it's userbot only

src/stores/GuildStore.js

@@ -39,7 +39,7 @@ class GuildStore extends DataStore {
 
   /**
    * Creates a guild.
-   * <warn>This is only available to bots in less than 10 guilds and user accounts.</warn>
+   * <warn>This is only available to bots in fewer than 10 guilds.</warn>
    * @param {string} name The name of the guild
    * @param {Object} [options] Options for the creating
    * @param {string} [options.region] The region for the server, defaults to the closest one available