ci: debian/x86_64_pyutils remove redundant rules

The debian/x86_64_pyutils job incorporates references to rules from the
python-test and .container jobs, but currently these jobs don't have any
express rules. The .container job does extend jobs that have rules, but
these same rules are already included in debian/x86_64 because it
extends the .debian-container job.

Remove these empty rule references to make debian/x86_64_pyutils more
readable.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32340>

.gitlab-ci/container/gitlab-ci.yml

@@ -267,10 +267,6 @@ debian/x86_64_pyutils:
     - .debian-container
   variables:
     MESA_IMAGE_TAG: &debian-x86_64_pyutils "${DEBIAN_PYUTILS_TAG}"
-  rules:
-    # python-test requires this job
-    - !reference [python-test, rules]
-    - !reference [.container, rules]
 
 .use-debian/x86_64_pyutils:
   extends: