/**
* Simplify profile edit/signup forms — hide non-essential fields
*
* Runs on: signup (page-login-signup), admin edit (page-user-editadvanced),
* and self edit (page-user-edit).
*
* Removes by element ID (not CSS) so the fields are fully absent from the
* DOM/form submission, not just visually hidden:
* - General section: city, country, timezone, description
* - Whole sections: picture upload, additional names, optional section
* - Custom profile field categories 0, 3, 4, 5, 6 (category 1 is kept —
* update this list if new custom field categories are added)
*
* NOTE: id_moodle_picture removal means NO ONE — including admins on
* editadvanced.php — can upload/change a profile picture through the
* standard edit form while this runs. To change a picture, temporarily
* comment out this block, purge caches, make the edit, then restore.
*/
