bootstrap-conda (src/environment-dev*.yml): Suppress pip section, for now

Author: Matthias Koeppe

bootstrap-conda

@@ -151,7 +151,7 @@ echo >&2 $0:$LINENO: generate conda environment files
                 done
             fi
         done
-    ) 4>> src/environment-dev-template.yml 5>> src/environment-optional-template.yml
+    ) 4>> /dev/null 5>> src/environment-optional-template.yml
 
 for f in environment environment-optional src/environment src/environment-optional src/environment-dev; do
     for python_version in 3.9 3.10 3.11; do