remove all the extra testing environments

.travis.yml

@@ -7,30 +7,6 @@ matrix:
     # Django 1.9, Wagtail 1.9
     - python: 2.7
       env: TOXENV=py27-django19-wagtail19
-    - python: 3.5
-      env: TOXENV=py35-django19-wagtail19
-    - python: 3.6
-      env: TOXENV=py36-django19-wagtail19
-
-    # Django 1.10, Wagtail 1.10
-    - python: 2.7
-      env: TOXENV=py27-django110-wagtail110
-    - python: 3.5
-      env: TOXENV=py35-django110-wagtail110
-    - python: 3.6
-      env: TOXENV=py36-django110-wagtail110
-
-    # Django 1.11, Wagtail 1.10
-    - python: 2.7
-      env: TOXENV=py27-django111-wagtail110
-    - python: 3.5
-      env: TOXENV=py35-django111-wagtail110
-    - python: 3.6
-      env: TOXENV=py36-django111-wagtail110
-
-  allow_failures:
-    - python: 3.5
-      env: TOXENV=lint
 
 install:
   - pip install tox codecov

tox.ini

@@ -1,18 +1,16 @@
 [tox]
-envlist = py{27,35,36}-django{19,110,111}-wagtail{19,110},lint
+envlist = py{27}-django{19}-wagtail{19},lint
 
 [testenv]
 commands = coverage run --parallel -m pytest {posargs}
 extras = test
 deps =
     django19: django>=1.9,<1.10
-    django110: django>=1.10<1.11
-    django111: django>=1.11,<1.12
     wagtail19: wagtail>=1.9,<1.10
     wagtail110: wagtail>=1.10,<1.11
 
 [testenv:coverage-report]
-basepython = python3.5
+basepython = python2.7
 deps = coverage
 pip_pre = true
 skip_install = true
@@ -22,7 +20,7 @@ commands =
 
 
 [testenv:lint]
-basepython = python3.5
+basepython = python2.7
 deps = flake8
 commands =
     flake8 src tests setup.py