Remove unused workflows and citations

Author: TGWolf

.github/workflows/citation-validation.yml

@@ -16,7 +16,7 @@ jobs:
       pull-requests: write
     runs-on: ubuntu-latest
 
-    if: ${{ github.actor == 'dependabot[bot]' }}
+    if: ${{ github.actor == 'dependabot[bot]' && github.event_name == 'pull_request' }}
     steps:
       - name: Fetch Metadata
         id: dependabot-metadata