.travis.yml in knife-google-2.2.1 vs .travis.yml in knife-google-3.0.0

@@ -1,9 +1,8 @@
 language: ruby
 cache: bundler
 sudo: false
 rvm:
-- 2.1.10
 - 2.2.5
 - 2.3.1
 - ruby-head
 branches:
   only: