refactor: remove typing caching (#6114)

Co-authored-by: DTrombett <73136330+DTrombett@users.noreply.github.com>

src/structures/User.js

@@ -159,34 +159,6 @@ class User extends Base {
     return typeof this.username === 'string' ? `${this.username}#${this.discriminator}` : null;
   }
 
-  /**
-   * Checks whether the user is typing in a channel.
-   * @param {ChannelResolvable} channel The channel to check in
-   * @returns {boolean}
-   */
-  typingIn(channel) {
-    return this.client.channels.resolve(channel)._typing.has(this.id);
-  }
-
-  /**
-   * Gets the time that the user started typing.
-   * @param {ChannelResolvable} channel The channel to get the time in
-   * @returns {?Date}
-   */
-  typingSinceIn(channel) {
-    channel = this.client.channels.resolve(channel);
-    return channel._typing.has(this.id) ? new Date(channel._typing.get(this.id).since) : null;
-  }
-
-  /**
-   * Gets the amount of time the user has been typing in a channel for (in milliseconds), or -1 if they're not typing.
-   * @param {ChannelResolvable} channel The channel to get the time in
-   * @returns {number}
-   */
-  typingDurationIn(channel) {
-    return this.client.channels.resolve(channel)._typing.get(this.id)?.elapsedTime ?? -1;
-  }
-
   /**
    * The DM between the client's user and this user
    * @type {?DMChannel}