docs: undocument private constructors (#6732)

src/structures/User.js

@@ -12,10 +12,6 @@ const UserFlags = require('../util/UserFlags');
  * @extends {Base}
  */
 class User extends Base {
-  /**
-   * @param {Client} client The instantiating client
-   * @param {APIUser} data The data for the user
-   */
   constructor(client, data) {
     super(client);