ci: drop now unneeded relativization of detekt paths

After some update, the manual relativization of paths in the detekt
results is not needed anymore and actually breaks reporting in GitHub.

Author: languitar

.github/workflows/build.yaml

@@ -34,12 +34,6 @@ jobs:
           path: |
             */build/test-results
             */build/reports
-      # In theory, the upload action should take care of stripping the GitHub
-      # runner workspace path from the file paths. But somehow that doesn't
-      # work. So do it manually.
-      - name: Relativize SARIF file paths
-        run: |
-          sed -i 's#${{ github.workspace }}/##' build/reports/detekt/*.sarif
       - name: Upload SARIF file
         uses: github/codeql-action/upload-sarif@v3
         with: