Merge pull request #2140 from HypothesisWorks/DRMacIver/gut-travis

Remove many of our Travis build tasks

.travis.yml

@@ -30,24 +30,16 @@ env:
 
 jobs:
   include:
-    # Prechecks that we want to run first.
+    # Prechecks that we want to run to make sure the deploy is good.
     - stage: precheck
       env: TASK=check-whole-repo-tests
     - env: TASK=lint
     - env: TASK=lint-ruby
-    - env: TASK=check-format
     - env: TASK=check-rust-tests
-
-    - stage: main
-      env: TASK=check-coverage
-    - env: TASK=check-py27
+    - env: TASK=check-ruby-tests
     - env: TASK=check-py36
       sudo: required
       dist: xenial
-    - env: TASK=check-ruby-tests
-    - env: TASK=check-django111
-    - env: TASK=check-pandas24
-
     - stage: deploy
       env: TASK=deploy
 
@@ -59,8 +51,7 @@ matrix:
 
 stages:
     - precheck
-    - main
-    - extras
+      if: type = push
     - name: deploy
       if: type = push