Disable Travis Deployment

Move to Heroku Github integration.

https://devcenter.heroku.com/articles/github-integration

.travis.yml

@@ -5,11 +5,5 @@ python:
 install:
   - pip install flake8
   - pip install -r requirements.txt
-before_script:
-  - flake8 app
+before_script: flake8 app
 script: npm install
-deploy:
-  provider: heroku
-  app: contribute-json
-  api_key:
-    secure: VyDxcDkmp+aAU2ymjH3WpcyEyosqn3z+a01QKrGuiFKr7+KltCW3lceX1sUN7Uc9JgDMIn1KXqRtN8SG0BnXj/PUjiGa+wLymTeh5KAA2u/fYnCtkl/iDI9oHs/rKFkDwQSxChCARia/tDQQNiLqQuSkudsCzXG7XlVYsx7Grbc=