.travis.yml in omniauth-oauth2-1.1.2 vs .travis.yml in omniauth-oauth2-1.2.0

@@ -1,18 +1,13 @@
-before_install:
-  - gem install bundler
-  - bundle --version
-  - gem update --system 2.1.11
-  - gem --version
 bundler_args: --without development
 language: ruby
 rvm:
   - 1.8.7
   - 1.9.2
   - 1.9.3
   - 2.0.0
   - 2.1.0
-  - rbx
+  - rbx-2
   - ruby-head
 matrix:
   include:
     - rvm: jruby-18mode
       env: JRUBY_OPTS="$JRUBY_OPTS --debug"