Add remove_image_size() and tests for it and has_image_size(), added in [27128].

props mordauk, markoheijnen.
fixes #26768. see #26951.


git-svn-id: https://develop.svn.wordpress.org/trunk@27129 602fd350-edb4-49c9-b593-d223f7449a82
Add a filter `wp_insert_attachment_data` in `wp_insert_attachment()`. This is similar to the `wp_insert_post_data` filter in `wp_insert_post()`.

Fixes #20547.



git-svn-id: https://develop.svn.wordpress.org/trunk@27130 602fd350-edb4-49c9-b593-d223f7449a82