Try simplifying CI

Author: konstin

.github/workflows/CI.yml

@@ -12,7 +12,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
       - run: cargo check --all-features
 
   test:
@@ -23,7 +22,6 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
       - run: cargo test
       - run: cargo test --all-features
 
@@ -32,8 +30,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - uses: dtolnay/rust-toolchain@nightly
       - run: cargo +nightly update -Z minimal-versions
       - run: cargo +stable test
 
@@ -49,7 +45,5 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          components: rustfmt
+      - run: rustup component add rustfmt
       - run: cargo fmt --all -- --check