Compact the code coverage tasks

There is no need to run twice the tests the same way.

.github/workflows/libp2p-rust-dht.yml

@@ -233,47 +233,6 @@ jobs:
             exit 1
         fi
 
-  weighted-code-coverage:
-
-    needs: [build, docs]
-
-    runs-on: ubuntu-latest
-
-    services:
-      postgres:
-        image: postgres
-        env:
-          POSTGRES_PASSWORD: mysecretpassword
-        options: >-
-          --health-cmd pg_isready
-          --health-interval 10s
-          --health-timeout 5s
-          --health-retries 5
-        ports:
-          - 5432:5432
-
-    steps:
-    - uses: actions/checkout@v3
-
-    - name: Install protobuf compiler
-      run: |
-        sudo apt-get update
-        sudo apt-get install protobuf-compiler
-
-    - name: Install Rust stable
-      uses: dtolnay/rust-toolchain@stable
-      with:
-        toolchain: stable
-
-    - name: Install grcov
-      env:
-        GRCOV_LINK: https://github.com/mozilla/grcov/releases/download
-        GRCOV_VERSION: v0.8.13
-        GRCOV_BINARY: grcov-x86_64-unknown-linux-musl.tar.bz2
-      run: |
-        curl -L "$GRCOV_LINK/$GRCOV_VERSION/$GRCOV_BINARY" |
-        tar xj -C $HOME/.cargo/bin
-
     - name: Install weighted-code-coverage
       env:
         WCC_LINK: https://github.com/SoftengPoliTo/weighted-code-coverage/releases/download
@@ -283,23 +242,7 @@ jobs:
         curl -L "$WCC_LINK/$WCC_VERSION/$WCC_BINARY" |
         tar xz -C $HOME/.cargo/bin
 
-    - name: Install llvm-tools-preview
-      run: |
-        rustup component add llvm-tools-preview
-
-    # Not necessary on a newly created image, but strictly advised
-    - name: Run cargo clean
-      run: |
-        cargo clean
-
-    - name: Run tests
-      env:
-        RUSTFLAGS: "-Cinstrument-coverage"
-        LLVM_PROFILE_FILE: "libp2p-rust-dht-%p-%m.profraw"
-      run: |
-        cargo test --verbose --all
-
-    - name: Run grcov
+    - name: Run grcov to produce a coveralls json
       run: |
         grcov . --binary-path ./target/debug/ -t coveralls -s . --token YOUR_COVERALLS_TOKEN > coveralls.json