Clean up unused JRuby logic in Travis config

We no longer test against JRuby.

Author: sds

.travis.yml

@@ -19,8 +19,6 @@ before_install:
 
 script:
   - bundle exec rspec
-  # Skip Overcommit on JRuby since it's unstable and doesn't actually test Overcommit
-  - '[[ $TRAVIS_RUBY_VERSION =~ ^jruby ]] && exit || true'
   - bundle exec overcommit --sign
   - bundle exec overcommit --sign pre-commit
   - bundle exec overcommit --run