revert pre-release branch stuff

Author: GFJHogue

.github/workflows/ci.yml

@@ -9,7 +9,6 @@ on:
   push:
     branches:
       - main
-      - pre-release
 
 permissions:
   id-token: write
@@ -82,7 +81,7 @@ jobs:
                 path: /tmp/image.tar
 
     docker-push:
-        if: ${{ github.event_name == 'push' && (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/pre-release') }}
+        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
         needs: docker-build
         runs-on: ubuntu-latest