.travis.yml in instrumental_agent-0.13.1 vs .travis.yml in instrumental_agent-0.13.2

@@ -1,10 +1,9 @@
+sudo: false
 language: ruby
 rvm:
   - 1.8.7
   - 1.9.2
   - 1.9.3
   - 2.0.0
   - jruby-18mode
   - jruby-19mode
-  - rbx-18mode
-  - rbx-19mode