fix: dev: cleanup annotation warnings in conda workflow

Signed-off-by: Stephen L Arnold <sarnold@vctlabs.com>

Author: sarnold

.github/workflows/conda-dev.yml

@@ -52,8 +52,9 @@ jobs:
       with:
         auto-update-conda: true
         python-version: ${{ matrix.python-version }}
-        channels: conda-forge
+        channels: conda-forge,defaults
         channel-priority: strict
+        conda-remove-defaults: true
         use-only-tar-bz2: true
 
     - name: Configure condadev environment