Delete remove defaults channel step from test_windows job

Author: oleksandr-pavlyk

.github/workflows/conda-package.yml

@@ -267,9 +267,6 @@ jobs:
           activate-environment: ${{ env.TEST_ENV_NAME }}
           python-version: ${{ matrix.python }}
 
-      - name: Remove defaults channel
-        run: conda config --remove channels defaults
-
       - name: Install conda-index
         run: |
           conda install -n base conda-index