try to silence stubtest warnings

Author: jswhit2

.github/workflows/build_master.yml

@@ -88,8 +88,6 @@ jobs:
 
     - name: Stubtest
       run: |
-        stubtest netCDF4 --allowlist .github/stubtest-allowlist --mypy-config-file=pyproject.toml
+        stubtest netCDF4 --allowlist .github/stubtest-allowlist --ignore-unused-allowlist --mypy-config-file=pyproject.toml
         mypy test
         mypy examples
-      env:
-        CI: false