pvops: disable memory cgroups

We don't use this, so save some wasted memory (usage tracking struct).

config-pvops

@@ -124,9 +124,7 @@ CONFIG_CPUSETS=y
 CONFIG_PROC_PID_CPUSET=y
 CONFIG_CGROUP_CPUACCT=y
 CONFIG_RESOURCE_COUNTERS=y
-CONFIG_CGROUP_MEM_RES_CTLR=y
-# CONFIG_CGROUP_MEM_RES_CTLR_SWAP is not set
-CONFIG_CGROUP_MEM_RES_CTLR_KMEM=y
+# CONFIG_CGROUP_MEM_RES_CTLR is not set
 # CONFIG_CGROUP_PERF is not set
 CONFIG_CGROUP_SCHED=y
 CONFIG_FAIR_GROUP_SCHED=y
@@ -142,7 +140,6 @@ CONFIG_USER_NS=y
 CONFIG_PID_NS=y
 CONFIG_NET_NS=y
 # CONFIG_SCHED_AUTOGROUP is not set
-CONFIG_MM_OWNER=y
 # CONFIG_SYSFS_DEPRECATED is not set
 CONFIG_RELAY=y
 CONFIG_BLK_DEV_INITRD=y
@@ -188,7 +185,6 @@ CONFIG_PCI_QUIRKS=y
 # CONFIG_COMPAT_BRK is not set
 CONFIG_SLAB=y
 # CONFIG_SLUB is not set
-# CONFIG_SLOB is not set
 CONFIG_PROFILING=y
 CONFIG_TRACEPOINTS=y
 CONFIG_OPROFILE=m