revert changes

.circleci/config.yml

@@ -120,26 +120,6 @@ jobs:
           command: |
             tox -e py35
 
-  build-python3.7:
-    docker:
-      - image: circleci/python:3.7.0
-    working_directory: ~/repo
-    steps:
-      - checkout
-      # Download and cache dependencies
-      - restore_cache:
-          keys:
-          - v1-dependencies-{{ checksum "requirements-test.txt" }}
-          # fallback to using the latest cache if no exact match is found
-          - v1-dependencies-
-      - run:
-          name: install dependencies
-          command: |
-            sudo python -m pip install --upgrade -r requirements-test.txt
-      - run:
-          name: run tests
-          command: |
-            tox -e py37
 workflows:
   version: 2
   build:
@@ -154,6 +134,4 @@ workflows:
       - build-python3.5:
           requires:
             - build-python3.4
-      - build-python3.7:
-          requires:
-            - build-python3.7
+