Fix CI

smortex · smortex · commit c6d528b415fd · 2018-08-22T17:54:30.000+02:00
This seems to be this problem: travis-ci/travis-ci#8969
diff --git a/.travis.yml b/.travis.yml
@@ -3,7 +3,6 @@
 language: ruby
 install: true
 script: "script/cibuild"
-before_install: gem install bundler
 
 matrix:
   include:
