conda: remove defaults channel

Author: markotoplak

.github/workflows/build-conda-installer.yml

@@ -50,7 +50,6 @@ jobs:
           condarc: >-
             channels:
               - conda-forge
-              - defaults
           environment-name: build
           create-args: conda conda-build boa python=3.11
           init-shell: bash cmd.exe

scripts/windows/condainstall.bat

@@ -33,7 +33,6 @@ rem # We need it so add-ons can be installed from conda-forge
 echo Appending conda-forge channel
 echo channels:         > "%PREFIX%\.condarc"
 echo   - conda-forge  >> "%PREFIX%\.condarc"
-echo   - defaults     >> "%PREFIX%\.condarc"
 
 rem Path to base conda env
 for /f %%f in ( '"%CONDA%" info --root' ) do (