Instead of warning the caller who is disabling OOM killer that the
feature isn't available, only warn if they are trying to **enable** OOM
killer and it can't be done.
Docker-DCO-1.1-Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com> (github: estesp)
Upstream-commit: 5a707d94d605fdf2a35d5a7033d1971b49745352
Component: engine