.travis.yml in resque-history-1.11.1 vs .travis.yml in resque-history-1.12.0

@@ -5,9 +5,7 @@
   - 1.9.2
   - 1.9.3
   - 2.0.0
   - jruby-18mode # JRuby in 1.8 mode
   - jruby-19mode # JRuby in 1.9 mode
-  - rbx-18mode
-  - rbx-19mode
 services:
   - redis-server