Hide an ACF field from front-end forms

acf-hide-field-front-end.php

<?php

/**
 * hide_group_id_field
 *
 * Hides a field when a field group is rendered as a front-end form.
 *
 * @param  array $wrapper
 * @param  array $field
 * @return array
 */
function hide_group_id_field( $wrapper, $field )
{
	if( is_admin() )
	{
		return $wrapper;
	}

	if( 'field_61db11b71ec0' != $field['key'] )
	{
		return $wrapper;
	}

	$wrapper['style'] = "display: none";
	return $wrapper;
}

//Hide a field in front-end forms
add_filter( 'acf/field_wrapper_attributes', 'hide_group_id_field', 10, 2 );