WordPress at a glance
function is not described

delete_meta() WP 1.2.0

Delete post meta data by meta ID.

No Hooks.

Return

true/false.

Usage

delete_meta( $mid );
$mid(int) (required)

Changelog

Since 1.2.0 Introduced.

Code of delete meta: wp-admin/includes/post.php WP 5.2.2

<?php
function delete_meta( $mid ) {
	return delete_metadata_by_mid( 'post', $mid );
}