remove extraneous pip cache dir

LindsayHill · LindsayHill · commit 219737aac793 · 2017-05-05T14:44:13.000-07:00
diff --git a/circle.yml b/circle.yml
@@ -9,7 +9,6 @@ checkout:
 dependencies:
   cache_directories:
     - ~/.cache/pip
-    - ~/.pip-cache
     - ~/.apt-cache
   override:
     - ~/ci/.circle/dependencies
