The code-coverage-report-action already handles uploading, don't try to do it ourselves

Author: nbudin

.github/workflows/ci.yml

@@ -325,12 +325,6 @@ jobs:
           path: vitest-coverage
       - name: Merge coverage reports
         run: npx cobertura-merge -o merged-coverage.xml package1=minitest-coverage/coverage.xml package2=vitest-coverage/cobertura-coverage.xml package3=minitest-system-coverage/coverage.xml
-      - name: Archive merged coverage report
-        uses: actions/upload-artifact@v5
-        if: always()
-        with:
-          name: coverage-main
-          path: merged-coverage.xml
       - name: Generate Coverage Report
         uses: clearlyip/code-coverage-report-action@v6
         id: code_coverage_report_action