remove codecov workflow part

Author: jonaspleyer

.github/workflows/test.yml

@@ -78,20 +78,3 @@ jobs:
 
       - name: Test with Miri
         run: cargo miri test --all-features
-
-  codecov:
-    runs-on: ubuntu-latest
-    needs: test
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - name: Install cargo-llvm-cov
-        uses: taiki-e/install-action@cargo-llvm-cov
-      - name: Generate code coverage
-        run: cargo llvm-cov --all-features --lcov --output-path lcov.info
-      - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3
-        with:
-          token: ${{ secrets.CODECOV_TOKEN }} # not required for public repos
-          files: lcov.info
-          fail_ci_if_error: true