test/ctr.bats: rm unneeded cleanup
test/ctr.bats: rm unneeded cleanup

Test cleanup (including stopping+removing all containers and pods,
and stopping crio) is performed via teardown.

Remove the cleanup from those test cases where it's not clearly
part of the test itself.

Signed-off-by: Kir Kolyshkin <3a017b8ddb3f9cf3e4a59978b004111bdeb97f08@gmail.com>

kubernetes-incubator/ocid,kubernetes-incubator/cri-o,nalind/cri-o,kubernetes-incubator/cri-o,kubernetes-incubator/cri-o,kubernetes-incubator/cri-o,kubernetes-incubator/ocid,kubernetes-incubator/ocid,nalind/cri-o,nalind/cri-o