Remove Guild#member (#4890)

src/structures/Guild.js

@@ -637,18 +637,6 @@ class Guild extends Base {
     return this.voiceStates.cache.get(this.client.user.id);
   }
 
-  /**
-   * Returns the GuildMember form of a User object, if the user is present in the guild.
-   * @param {UserResolvable} user The user that you want to obtain the GuildMember of
-   * @returns {?GuildMember}
-   * @example
-   * // Get the guild member of a user
-   * const member = guild.member(message.author);
-   */
-  member(user) {
-    return this.members.resolve(user);
-  }
-
   /**
    * Fetches this guild.
    * @returns {Promise<Guild>}