Remove dead push-action/** trigger from ci_tests.yml

push-protected is no longer used so these temp branches are never
created. The trigger and its explanatory comment are dead code.

Author: CasperWA

.github/workflows/ci_tests.yml

@@ -5,7 +5,6 @@ on:
   push:
     branches:
       - 'master'
-      - 'push-action/**'  # Allow pushing to protected branches (using CasperWA/push-protected)
 
 jobs:
   pre-commit_audit: