entirely remove cbinding workflow

.github/workflows/ci.yml

@@ -85,18 +85,3 @@ jobs:
           name: codecov-umbrella
           token: ${{ secrets.CODECOV_TOKEN }}
           verbose: true
-
-  cbinding:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout sources
-        uses: actions/checkout@v4
-        with:
-          submodules: recursive
-          ref: ${{ github.event.pull_request.head.sha }}
-
-      - name: Setup Nimbus Build System
-        uses: ./.github/actions/nimbus-build-system
-        with:
-          os: linux
-          nim_version: ${{ env.nim_version }}