taskotron: we don't run tasks from distgit (yet)

Do not clone and search it needlessly.

roles/taskotron/taskotron-trigger/templates/trigger_rules.yml.j2

@@ -2,7 +2,6 @@
 - when: {message_type: KojiBuildPackageCompleted}
   do:
     - {tasks: [rpmlint, rpmgrill, python-versions]}
-    - {discover: {repo: '{{ trigger_distgit_repo_url }}/rpms/${name}{{'.git' if deployment_type in ['stg'] else ''}}', branch: "${distgit_branch}", fallback_branch: 'master', recursive: true}}
 
 - when: {message_type: KojiBuildPackageCompleted, name: docker}
   do: