Cannot get conda activate to work on *nix

Author: jmwright

appveyor.yml

@@ -27,7 +27,6 @@ install:
     - conda update -q conda
     - cmd: conda init cmd.exe
     - sh: conda init bash
-    - sh: source ~/miniconda3/etc/profile.d/conda.sh
     - conda env create -f environment.yml
     - cmd: conda activate cadquery
     - sh: conda activate cadquery