Neutralize user.js behavior in Drupal 6

Problem/Motivation

In Drupal 7, this piece of code is used to disable the user.module password javascript:

/**
 * Implements hook_element_info_alter().
 */
function password_strength_element_info_alter(&$types) {
  // Remove user_form_process_password_confirm process callback from
  // password_confirm element. This will remove the password strength
  // checker on password fields.
  if (isset($types['password_confirm']['#process'])) {
    $process = 'user_form_process_password_confirm';
    if (($position = array_search($process, $types['password_confirm']['#process'])) !== FALSE) {
      unset($types['password_confirm']['#process'][$position]);
    }
  }
}

However Drupal 6 doesn't offer hook_element_info_alter() or similar. The js is added by _user_password_dynamic_validation() which is called in user_edit_form().

Proposed resolution

Remaining tasks

User interface changes

API changes