BP_Groups_Member::delete( int $user_id, int $group_id )

	public static function delete( $user_id, $group_id ) {
		global $wpdb;

		/**
		 * Fires before a group membership is deleted.
		 *
		 * @since BuddyPress 2.3.0
		 *
		 * @param int $user_id  ID of the user.
		 * @param int $group_id ID of the group.
		 */
		do_action( 'bp_groups_member_before_delete', $user_id, $group_id );

		$bp = buddypress();
		$remove = $wpdb->query( $wpdb->prepare( "DELETE FROM {$bp->groups->table_name_members} WHERE user_id = %d AND group_id = %d", $user_id, $group_id ) );

		// Update the user's group count.
		self::refresh_total_group_count_for_user( $user_id );

		// Update the group's member count.
		self::refresh_total_member_count_for_group( $group_id );

		/**
		 * Fires after a member is removed from a group.
		 *
		 * @since BuddyPress 2.3.0
		 *
		 * @param int $user_id  ID of the user.
		 * @param int $group_id ID of the group.
		 */
		do_action( 'bp_groups_member_after_delete', $user_id, $group_id );

		return $remove;
	}