CircleCI: Disable artifact collection on OS X

The storeartifacts step inexplicably hangs on OS X. I am currently be working
with CircleCI support to resolve this.

.circleci/config.yml

@@ -120,8 +120,9 @@ jobs:
       - *make
       - *test
       - *bindist
-      - *collectartifacts
-      - *storeartifacts
+      # Disabled due to CircleCI brokenness
+      #- *collectartifacts
+      #- *storeartifacts
 
 workflows:
   version: 2