Eliminate less-efficient (because separate) CI jobs.

Author: youngman-g

.github/workflows/quickstart.yml

@@ -18,7 +18,12 @@ jobs:
 
   # These "X_and_Y" jobs each combine some steps that previously
   # existed in separate jobs, because combining them is more
-  # efficient.
+  # resource-efficient.
+  #
+  # The two remaining jobs are still separate because it's useful to
+  # be able easily to see that a change passes all tests but just has
+  # clippy issues.
+
   build_and_test:
     # Combines previous Check, Build (stable), Test Suite (Rust stable)
     name: Check, Build and Test (Rust stable)
@@ -32,53 +37,10 @@ jobs:
 
   fmt_and_clippy:
     # Combines previous Rustfmt (stable) and Clippy (stable) jobs
-    name: Format and Lint Checks
+    name: Format and Lint Checks (Rust stable)
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
       - run: cargo fmt --all --check
       - run: cargo clippy --workspace -- -D warnings
-
-  # The following jobs are not combined, and so are less efficient.
-  # We plan to remove these if the combined jobs above work OK.
-
-  check:
-    name: Check
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - run: cargo check --workspace --all-features
-
-  build:
-    name: Build (stable)
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - run: cargo build --workspace --all-features
-
-  test:
-    name: Test Suite (Rust stable)
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - run: cargo test --workspace --all-features
-
-  fmt:
-    name: Rustfmt (stable)
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - run: cargo fmt --all --check
-
-  clippy:
-    name: Clippy (stable)
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - run: cargo clippy --workspace -- -D warnings