Do not run on push events

.github/workflows/dangermattic.yml

@@ -1,15 +1,13 @@
 name: Danger on GitHub PR events
 
 on:
-  push:
-    branches:
-      - 'iangmaia/gha-triggering-danger**'
   pull_request:
     types: [review_requested, review_request_removed, labeled, unlabeled, milestoned, demilestoned]
 
 jobs:
   dangermattic:
     runs-on: ubuntu-latest
+    if: github.event.number > 0
     steps:
       - name: Print some test env
         run: |