WordPress at a glance
function is not described

delete_users_add_js() WP 3.5.0

No Hooks.

Return

Nothing (null).

Usage

delete_users_add_js() ?>;

Code of delete users add js: wp-admin/includes/user.php VER 5.0.3

<?php
function delete_users_add_js() { ?>
<script>
jQuery(document).ready( function($) {
	var submit = $('#submit').prop('disabled', true);
	$('input[name="delete_option"]').one('change', function() {
		submit.prop('disabled', false);
	});
	$('#reassign_user').focus( function() {
		$('#delete_option1').prop('checked', true).trigger('change');
	});
});
</script>
<?php
}