Summary:
This code has been commented for more than a decade. Given that no any
useful comment is provided along the commented code, it's difficult to
say what exactly we need to fix. From the other side, the commented
code does nothing.

Reviewers: #kwin, romangg

Reviewed By: #kwin, romangg

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D24472