travis: Stop testing on py3.5 (only 2.7, 3.4, 3.6)

.travis.yml

@@ -1,37 +1,23 @@
+# https://travis-ci.org/evonove/django-oauth-toolkit
+sudo: false
 language: python
-python:
-  - "3.5"
 
-sudo: false
+python: "3.6"
 
 env:
   - TOXENV=py27-django110
   - TOXENV=py27-django111
   - TOXENV=py34-django110
   - TOXENV=py34-django111
-  - TOXENV=py35-django110
-  - TOXENV=py35-django111
-  - TOXENV=py35-djangomaster
   - TOXENV=py36-django111
   - TOXENV=py36-djangomaster
   - TOXENV=docs
   - TOXENV=flake8
 
 matrix:
   fast_finish: true
-  include:
-    - python: "3.6"
-      env: TOXENV=py36-django111
-    - python: "3.6"
-      env: TOXENV=py36-djangomaster
-  exclude:
-    - python: "3.5"
-      env: TOXENV=py36-django111
-    - python: "3.5"
-      env: TOXENV=py36-djangomaster
 
   allow_failures:
-    - env: TOXENV=py35-djangomaster
     - env: TOXENV=py36-djangomaster
 
 cache: