drop cleantree

Author: Shane Osbourne

.github/workflows/tests.yml

@@ -35,8 +35,6 @@ jobs:
       - run: npm run lint
       - run: npm run lint-no-output-globals
       - run: npm run test-unit
-      - name: "Clean tree"
-        run: "npm run test-clean-tree"
   integration:
     runs-on: ubuntu-20.04
     timeout-minutes: 10