Remove media tabs from image upload in WordPress admin

This is a little trick I found for hiding the “choose from library” tabs in the pop-up image upload box in the WordPress admin area:

function remove_medialibrary_tab($tabs) {
   unset($tabs['library']);
   return $tabs;
}
add_filter('media_upload_tabs','remove_medialibrary_tab');

Just put this in your theme’s function file!