Delete some commented code
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