Don't bother pre-downloading deps in Circle.

I think iterating all the dependencies and then caching them
might actually be slower than just getting on with it.

circle.yml

           ../meta/client
 
 dependencies:
-  override:
-    - ./gradlew --parallel client:dependencies plugins:dependencies:
-        pwd:
-          ../meta
+  override: []
 
 test:
   override: