update travis.yml

Author: sanzmauro

.travis.yml

@@ -12,9 +12,5 @@ addons:
 git:
   depth: false
 
-before_install:
-  # - gem uninstall -v '< 2' -i $(rvm gemdir)@global -ax bundler || true
-  # - gem install bundler -v '>= 2'
-
 after_success:
   - bash sonar-scanner.sh