packagegroups: Remove obmc-mgr-system

The system manager (obmc-mgr-system) which provided GPIO
functionality is being deprecated and it's not in use anymore:
* GPIOs have moved out of D-Bus (see openbmc/openbmc#3332).
* Tools depending on its GPIO functions have been updated to
call local functions instead.
* The systemd service files have been updated to not depend
on system manager.

Change-Id: I317d794ecdf672dfdffb91c53dda6e81eb037387
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/meta-common/recipes-intel/packagegroups/packagegroup-intel-apps.bb b/meta-common/recipes-intel/packagegroups/packagegroup-intel-apps.bb
index 2490a5c..10d616f 100644
--- a/meta-common/recipes-intel/packagegroups/packagegroup-intel-apps.bb
+++ b/meta-common/recipes-intel/packagegroups/packagegroup-intel-apps.bb
@@ -41,7 +41,6 @@
 
 SUMMARY_${PN}-system = "Intel System"
 RDEPENDS_${PN}-system = " \
-        obmc-mgr-system \
         bmcweb \
         entity-manager \
         intel-ipmi-oem \