remove artifact upload

Author: mmcky

.github/workflows/ci.yml

@@ -71,12 +71,6 @@ jobs:
         shell: bash -l {0}
         run: |
           jb build lectures --path-output ./ -nW --keep-going
-      - name: Upload Build Folder
-        uses: actions/upload-artifact@v4
-        if: failure()
-        with:
-          name: build-assets
-          path: _build/
       - name: Upload Execution Reports (HTML)
         uses: actions/upload-artifact@v4
         if: failure()