Supress further unused errors

Author: andrewdavidmackenzie

.github/workflows/clippy_build_test.yml

@@ -85,7 +85,7 @@ jobs:
         if: matrix.rust == 'stable'
         run: |
           sudo grcov . --binary-path target/debug/ -s . -t lcov --branch --ignore-not-existing --ignore "/*" -o coverage.info
-          sudo lcov --remove coverage.info lcov --ignore-errors unused '/Applications/*' 'target/debug/build/**' 'target/release/build/**' '/usr*' '**/errors.rs' '**/build.rs' 'examples/**' '*tests/*' -o coverage.info
+          sudo lcov --remove coverage.info lcov --ignore-errors unused,unused '/Applications/*' 'target/debug/build/**' 'target/release/build/**' '/usr*' '**/errors.rs' '**/build.rs' 'examples/**' '*tests/*' -o coverage.info
           sudo bash <(curl -s https://codecov.io/bash) -f coverage.info