[kde-base/kdeedu-meta] Remove special handling for  kde-base/rocs on pp64.

This was introduced in 97383db247826e8f2c41dd259156f13c966daf43 to avoid
build failure wrt bug #462550. Since the minimum GCC version has been raised,
it's no longer possible to hit this issue.

Package-Manager: portage-2.2.12
[kde-base/systemsettings] Introduce kscreen USE flag to disable randr KCM in favour of kde-misc/kscreen wrt bug #524266.

Package-Manager: portage-2.2.12