tests: Remove inaccurate comment
This comment refers to overiding $PODMAN although the code below does
nothing of the sort.  Presumbly the comment has been outdated by altering
the containers.conf / $CONTAINERS_CONF instead.
@@ -37,9 +37,6 @@ fi
# while retaining the ability to include these if they so desire.
# Some CI systems set this to runc, overriding the default crun.
-# Although it would be more elegant to override options in run_podman(),
-# we instead override $PODMAN itself because some tests (170-run-userns)
-# have to invoke $PODMAN directly.
if [[ -n $OCI_RUNTIME ]]; then
if [[ -z $CONTAINERS_CONF ]]; then
# FIXME: BATS provides no mechanism for end-of-run cleanup[1]; how
