mem/oom: remove non-existent case OVERCOMMIT from oom()

Looks like there is no such a case "OVERCOMMIT" in oom(), so we can just
remove it.

Signed-off-by: Han Pingtian <hanpt@linux.vnet.ibm.com>
Reviewed-by: Jan Stancek <jstancek@redhat.com>
Acked-by: Cyril Hrubis <chrubis@suse.cz>
3 files changed