.travis.yml in fluent-plugin-bigquery-0.5.0.beta2 vs .travis.yml in fluent-plugin-bigquery-1.0.0

@@ -17,9 +17,6 @@
       gemfile: Gemfile
 
 before_install:
   - gem update bundler
 
-before_install:
-  - gem update bundler
-
 script: bundle exec rake test