Remove olde CircleCI config

This configuration was still around before we added a new one in
https://github.com/pelias/api/pull/956.

circle.yml

@@ -1,17 +0,0 @@
-machine:
-  ruby:
-    version: 2.1.2
-  node:
-    version: 0.12.2
-
-deployment:
-  dev:
-    branch: master
-    commands:
-      - git clone git@github.com:mapzen/pelias-deploy.git && cd pelias-deploy && bundle install
-      - cd pelias-deploy && bundle exec rake deploy:api dev
-  prod_build:
-    branch: staging
-    commands:
-      - git clone git@github.com:mapzen/pelias-deploy.git && cd pelias-deploy && bundle install
-      - cd pelias-deploy && bundle exec rake deploy:api prod_build