BP_XProfile_Field::delete_for_group( int $group_id )

	public static function delete_for_group( $group_id = 0 ) {
		global $wpdb;

		// Bail if no group ID.
		if ( empty( $group_id ) ) {
			return false;
		}

		$bp      = buddypress();
		$ids     = $wpdb->get_results( $wpdb->prepare( "SELECT id FROM {$bp->profile->table_name_fields} WHERE group_id = %d", $group_id ) );
		$sql     = $wpdb->prepare( "DELETE FROM {$bp->profile->table_name_fields} WHERE group_id = %d", $group_id );
		$deleted = $wpdb->get_var( $sql );

		// Return true if fields were deleted.
		if ( false !== $deleted ) {
			foreach ( $ids as $id ) {
			    if ( isset( $id->id ) ) {
				    $wpdb->get_var( $wpdb->prepare( "DELETE FROM {$bp->profile->table_name_meta} WHERE object_id = %s", $id->id ) );
                }
			}
            $wpdb->get_var( $wpdb->prepare( "DELETE FROM {$bp->profile->table_name_meta} WHERE object_id = %s", $group_id ) );
			return true;
		}

		return false;
	}