Remove redundant build job

.github/workflows/ci.yml

@@ -6,36 +6,17 @@ on:
     branches: [main]
 
 jobs:
-  build-and-test:
-    name: Build and test
-    strategy:
-      matrix:
-        os: [ubuntu-22.04, macos-13]
-    runs-on: ${{ matrix.os }}
-    steps:
-      - uses: actions/checkout@v3
-      - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v2
-      - name: cargo test
-        run:
-          nix develop -c cargo test
-      - name: cargo build
-        run:
-          nix develop -c cargo build
-      - name: nix build
-        run:
-          nix build
-
   check-flake-dirty:
     name: Check flake.lock test (dirty 😈)
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v3
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v2
+        uses: DeterminateSystems/nix-installer-action-cache@main
       - name: Check flake.lock
         run: |
           nix develop -c cargo run -- ./flake.dirty.lock
+
   check-flake-clean:
     name: Check flake.lock test (clean 👼)
     runs-on: ubuntu-22.04