Revert "ci(pkg-pr-new): add 'vapor' branch for pull-request" (#12943)

This reverts commit d18c24869143e16e49dd08a9b975a118ecc712d8.

.github/workflows/ci.yml

@@ -9,7 +9,6 @@ on:
     branches:
       - main
       - minor
-      - vapor
 
 jobs:
   test: