Remove coverage artifact

Author: kpp

.github/workflows/rust.yml

@@ -46,9 +46,3 @@ jobs:
         uses: codecov/[email protected]
         with:
           token: ${{secrets.CODECOV_TOKEN}}
-
-      - name: archive code coverage results
-        uses: actions/upload-artifact@v1
-        with:
-          name: code-coverage-report
-          path: cobertura.xml