feat(APIMessage): remove disableMentions (#4836)

* chore: remove disableMentions

* style: fix eslint

src/util/Constants.js

@@ -23,7 +23,6 @@ const browser = (exports.browser = typeof window !== 'undefined');
  * (-1 or Infinity for unlimited - don't do this without sweeping, otherwise memory usage may climb indefinitely.)
  * @property {boolean} [fetchAllMembers=false] Whether to cache all guild members and users upon startup, as well as
  * upon joining a guild (should be avoided whenever possible)
- * @property {DisableMentionType} [disableMentions='none'] Default value for {@link MessageOptions#disableMentions}
  * @property {MessageMentionOptions} [allowedMentions] Default value for {@link MessageOptions#allowedMentions}
  * @property {PartialType[]} [partials] Structures allowed to be partial. This means events can be emitted even when
  * they're missing all the data for a particular structure. See the "Partials" topic listed in the sidebar for some
@@ -47,7 +46,6 @@ exports.DefaultOptions = {
   messageSweepInterval: 0,
   messageEditHistoryMaxSize: -1,
   fetchAllMembers: false,
-  disableMentions: 'none',
   partials: [],
   restWsBridgeTimeout: 5000,
   restRequestTimeout: 15000,