Remove source

Author: Susan Vanderplas

.github/workflows/main.yml

@@ -77,8 +77,6 @@ jobs:
             /bin/sh -c $'
               set -e
 
-              source /project/_environment
-
               echo "=== Checking renv cache path ==="
               ls -lah ${RENV_PATHS_CACHE} || echo "renv cache dir not found"