wp-includes/icons.php:36Unregisters an icon collection.
$slugstringboolfunction wp_unregister_icon_collection( $slug ) { return WP_Icon_Collections_Registry::get_instance()->unregister( $slug );}Introduced in 7.1.0.
Signature, return type and hooks compared across 1 parsed release.
src/wp-includes/icons.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.