apply_filters( "delete_{$meta_type}_metadata", null|bool $delete, int $object_id, string $meta_key, mixed $meta_value, bool $delete_all )

442	 * @param string    $meta_key   Metadata key.443	 * @param mixed     $meta_value Metadata value. Must be serializable if non-scalar.444	 * @param bool      $delete_all Whether to delete the matching metadata entries445	 *                              for all objects, ignoring the specified $object_id.446	 *                              Default false.447	 */448	$check = apply_filters( "delete_{$meta_type}_metadata", null, $object_id, $meta_key, $meta_value, $delete_all );449	if ( null !== $check ) {450		return (bool) $check;451	}452 453	$_meta_value = $meta_value;454	$meta_value  = maybe_serialize( $meta_value );