Revert "Address bundler warnings"

This reverts commit d1f8e95.

Author: mvz

.travis.yml

@@ -18,7 +18,7 @@ language: ruby
 # original `cache: bundler` is a better option.
 cache: bundler
 
-bundler_args: "--retry=3 --jobs=3"
+bundler_args: "--binstubs --path ../bundle --retry=3 --jobs=3"
 
 before_install:
   - script/update_rubygems_and_install_bundler
@@ -29,8 +29,6 @@ before_script:
   # Rails 4.x complains with a bundler rails binstub in PROJECT_ROOT/bin/
   - rm -f bin/rails
   - bundle exec rails --version
-  - bundle config set path ../bundle
-  - bundle binstubs --force
 
 script: "script/run_build 2>&1"