[scripts] Drop enforcedeco script
Summary:
GTK clients check whether _GTK_FRAME_EXTENTS is in _NET_SUPPORTED, so we
don't need this script anymore.
Also, because GTK clients don't set shadow extents, this script
is doing nothing.
Reviewers: KWin, davidedmundson
Reviewed By: KWin, davidedmundson
Subscribers: ngraham, jackg, broulik, kwin
Tags: KWin
Differential Revision: https://phabricator.kde.org/D21371