Revert "TEMP - enable building for this branch"

This reverts commit 9af170e.

Author: lucteo

.github/workflows/ci.cpu.yml

@@ -6,7 +6,6 @@ on:
       - main
       - "member-function-customization"
       - "pull-request/[0-9]+"
-      - "parallel-scheduler-backend-api"
 
 concurrency:
   group: ${{ github.workflow }}-on-${{ github.event_name }}-from-${{ github.ref_name }}