bp_get_groups_of_removed_group_types()

function bp_get_groups_of_removed_group_types() {

	$group_id = array();

	// get removed group type post ids
	$bp_group_type_ids = bp_get_removed_group_types();

	// get removed group type names/slugs
	$bp_group_type_names = array();
	if( isset($bp_group_type_ids) && !empty($bp_group_type_ids) ){
		foreach($bp_group_type_ids as $single){
			$bp_group_type_names[] = $single['name'];
		}
	}

	// get group group ids
	if( isset($bp_group_type_names) && !empty($bp_group_type_names) ){
		foreach($bp_group_type_names as $type_name){
			$group_ids = bp_get_group_ids_by_group_types( $type_name );

			if( isset($group_ids) && !empty($group_ids) ){
				foreach($group_ids as $single){
					$group_id[] = $single['id'];
				}
			}
		}
	}

	return bp_group_ids_array_flatten( $group_id );
}