Disable nix-build

.github/workflows/nix-build.yml

@@ -1,21 +0,0 @@
-name: "Nix Build"
-
-# on: [push]
-on: []
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: cachix/install-nix-action@v8
-      - name: Cache nix store
-        uses: actions/cache@v1
-        with:
-          path: /nix
-          key: ${{ runner.os }}-nix-store
-      - uses: cachix/cachix-action@v5
-        with:
-          name: hitsofcode
-          signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
-          attributes: package