chore: use machete instead of udeps in CI

.github/workflows/ci.yml

@@ -149,7 +149,7 @@ jobs:
         with:
           clean: false
       - run: echo "NEW_BENCH_INPUT_FILES_PREFIX=$(cat ./crates/committer_cli/src/tests/flow_test_files_prefix)" >> $GITHUB_ENV
-      
+
       # Input files didn't change.
       - if: env.OLD_BENCH_INPUT_FILES_PREFIX == env.NEW_BENCH_INPUT_FILES_PREFIX
         run: |
@@ -222,19 +222,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@master
-        name: "Rust Toolchain Setup"
-        with:
-          toolchain: nightly-2024-01-12
-      - uses: Swatinem/rust-cache@v2
-        id: "cache-cargo"
-      - if: ${{ steps.cache-cargo.outputs.cache-hit != 'true' }}
-        name: "Download and run cargo-udeps"
-        run: |
-          wget -O - -c https://github.com/est31/cargo-udeps/releases/download/v0.1.45/cargo-udeps-v0.1.45-x86_64-unknown-linux-gnu.tar.gz | tar -xz
-          cargo-udeps-*/cargo-udeps udeps
-        env:
-          RUSTUP_TOOLCHAIN: nightly-2024-01-12
+      - name: Run Machete (detect unused dependencies)
+        uses: bnjbvr/cargo-machete@main
 
   all-tests:
     runs-on: ubuntu-latest

crates/committer/Cargo.toml

@@ -32,3 +32,8 @@ strum.workspace = true
 strum_macros.workspace = true
 thiserror.workspace = true
 tokio.workspace = true
+
+# Optional dependencies required for tests and the testing feature.
+# See [here](https://github.com/bnjbvr/cargo-machete/issues/128).
+[package.metadata.cargo-machete]
+ignored = ["strum"]

crates/committer_cli/Cargo.toml

@@ -37,3 +37,8 @@ tokio.workspace = true
 harness = false
 name = "committer_bench"
 path = "benches/committer_bench.rs"
+
+# Optional dependencies required for tests and the testing feature.
+# See [here](https://github.com/bnjbvr/cargo-machete/issues/128).
+[package.metadata.cargo-machete]
+ignored = ["hex", "strum_macros"]