core-image-sato: drop packagegroup-core-x11-sato-games from IMAGE_INSTALL
packagegroup-core-x11-sato-games package is being RDEPENDS by
packagegroup-core-x11-sato, hence will be installed if x11-sato is
choosen in IMAGE_FEATURES. So it's unnecessary appending it into
IMAGE_INSTALL.
Even worse, it's causing the following error when x11 is not
in DISTRO_FEATURES:
| ERROR: Required build target 'core-image-sato' has no buildable providers.
| Missing or unbuildable dependency chain was: ['core-image-sato', 'packagegroup-core-x11-sato-games']
Signed-off-by: Ming Liu <peter.x.liu@external.atlascopco.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
