Fixed a bug with delete_term_meta API (meta name was required)

[fembuelita]

Simple iterate over each field to delete each term individually.

[ocholabs]

Hi, if you do this fix you'll get php warnings as in delete_term_meta( $term_id, $field ); $field is an array and you should pass a string I changed it to delete_term_meta( $term_id, $field['id']); And got no more warnings now.