fixup! Remove redundant bundler downgrade hack

Author: pirj

.travis.yml

@@ -22,7 +22,6 @@ bundler_args: "--binstubs --path ../bundle --retry=3 --jobs=3"
 
 before_install:
   - script/update_rubygems_and_install_bundler
-  - script/downgrade_bundler_on_old_rails
   - script/clone_all_rspec_repos
 
 before_script: