test/system: re-enable module command line completion test

The paths are no exported again in the latest common changes from
 https://github.com/containers/container-libs/pull/790

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

test/system/800-config.bats

@@ -198,8 +198,6 @@ EOF
     skip_if_remote "--module is not supported for remote clients"
     skip_if_not_rootless "loading a module from XDG_CONFIG_HOME requires rootless"
 
-    skip "FIXME: re-enable modules shell completion once it works again in container-libs"
-
     fake_home="$PODMAN_TMPDIR/home/.config"
     fake_modules_dir="$fake_home/containers/containers.conf.modules"
     mkdir -p $fake_modules_dir