Fix CI: correct test names and remove undefined benchmarks

- Fix journey_tests (was 'journeys')
- Remove benchmarks job (no benchmarks defined)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/test.yml

@@ -42,22 +42,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
-      - run: cargo test --package vestige-e2e-tests --test journeys -- --test-threads=1
-
-  benchmarks:
-    name: Performance Benchmarks
-    runs-on: ubuntu-latest
-    if: github.ref == 'refs/heads/main'
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
-      - run: cargo bench --package vestige-e2e-tests
-      - uses: benchmark-action/github-action-benchmark@v1
-        with:
-          tool: 'cargo'
-          alert-threshold: '150%'
-          comment-on-alert: true
+      - run: cargo test --package vestige-e2e-tests --test journey_tests -- --test-threads=1
 
   coverage:
     name: Code Coverage