Remove repo caching

This appears to cache mranderson's work which is plausibly problematic across CI jobs.

Author: vemv

.circleci/config.yml

@@ -82,7 +82,6 @@ commands:
           paths:
             - ~/.m2
             - .cpcache
-            - repo
           key: clojure-<< parameters.cache_version >>-{{ checksum "/tmp/clojure_cache_seed" }}
 
 # The jobs are relatively simple. One runs utility commands against