No "Create Audio Playlist" button.

Hey guys,

I’ve just updated to WordPress 3.9 and I don’t have a Create Audio Playlist (or Create Video Playlist) button in the Add Media dialogue.

Could this be due to the fact that I have removed support for video formats in my functions.php file?

add_filter('upload_mimes', 'custom_upload_mimes');
function custom_upload_mimes ( $existing_mimes=array() ) {
unset( $existing_mimes['mp4'] );
unset( $existing_mimes['m4v'] );
unset( $existing_mimes['mov'] );
unset( $existing_mimes['wmv'] );
unset( $existing_mimes['avi'] );
unset( $existing_mimes['mpg'] );
unset( $existing_mimes['ogv'] );
unset( $existing_mimes['3gp'] );
unset( $existing_mimes['3g2'] );

return $existing_mimes;
}