Fix YAML error in molecule config.

Author: geerlingguy

molecule/default/molecule.yml

@@ -14,8 +14,6 @@ platforms:
     volumes:
       - /sys/fs/cgroup:/sys/fs/cgroup:ro
       - /var/lib/docker
-    volumes:
-      - /sys/fs/cgroup:/sys/fs/cgroup:ro
     privileged: true
     pre_build_image: true
 provisioner: