.travis.yml in airborne-0.2.7 vs .travis.yml in airborne-0.2.8

@@ -1,10 +1,7 @@
 sudo: false
 language: ruby
 rvm:
-  - 2.0.0
-  - 2.1.0
-  - 2.1.7
   - 2.2.3
   - 2.3.1
 
 script: bundle exec rspec spec
 before_install: