.travis.yml in devise-two-factor-2.2.1 vs .travis.yml in devise-two-factor-3.0.0

@@ -3,9 +3,8 @@
 cache: bundler
 before_install:
   - gem update --system
   - gem update bundler
 rvm:
-  - "2.0.0"
   - "2.1"
   - "2.2"
   - "2.3.0"