[xbmc] Remove guires setting.

See https://github.com/xbianonpi/xbian-package-xbmc/commit/7f709b03bce074de9530d31be1bc4d116259481d#commitcomment-7068866

@mk01 could you please review? I never touched config-shell and I'm not that confident that I didn't remove too much and/or missed something.