CI: Cleanup redundant jobs

The default action that we distribute via modulesync already checks the
REFERENCE.md and does all the linting.

Author: bastelfreak

.github/workflows/pr_testing.yaml

@@ -26,22 +26,6 @@ jobs:
       - name: Run ShellCheck
         run: shellcheck -x tasks/*.sh files/*.sh
 
-  reference-check:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ruby/setup-ruby@v1
-        with:
-          # Not testing 3.4 yet, puppet fails to load here:
-          # bundler: failed to load command: puppet (/home/jpartlow/.rbenv/versions/3.4.3/lib/ruby/gems/3.4.0/bin/puppet)
-          # /home/jpartlow/.rbenv/versions/3.4.3/lib/ruby/gems/3.4.0/bundler/gems/puppet-6992edd1da38/lib/puppet/feature/base.rb:21:in '<top (required)>': Cannot determine basic system flavour (Puppet::Error)
-          ruby-version: '3.3'
-          bundler-cache: true
-      - name: Regenerate REFERENCE.md
-        run: bundle exec puppet strings generate --format markdown
-      - name: Check whether REFERENCE.md has uncommitted changes
-        run: git diff --exit-code REFERENCE.md
-
   test-install-task-on-ubuntu:
     strategy:
       matrix: