avoid warnings in github action

Author: mattip

.github/workflows/posix.yml

@@ -163,6 +163,8 @@ jobs:
         path: libs/openblas*.tar.gz
 
     - uses: conda-incubator/[email protected]
+      with:
+        conda-remove-defaults: true
 
     - name: Upload
       # see https://github.com/marketplace/actions/setup-miniconda for why

.github/workflows/windows.yml

@@ -164,6 +164,8 @@ jobs:
         python -c "import scipy_openblas32; print(scipy_openblas32.get_pkg_config())"
 
     - uses: conda-incubator/[email protected]
+      with:
+        conda-remove-defaults: true
 
     - name: Upload
       # see https://github.com/marketplace/actions/setup-miniconda for why