.travis.yml in public_suffix-3.1.1 vs .travis.yml in public_suffix-4.0.0

@@ -13,16 +13,9 @@
 
 cache:
   - bundler
 
 matrix:
-  include:
-    - rvm: 2.1
-      before_install:
-        - gem install bundler -v '< 2.0'
-    - rvm: 2.2
-      before_install:
-        - gem install bundler -v '< 2.0'
   allow_failures:
     - rvm: ruby-head
     - rvm: jruby-9.1.5.0
 
 before_install: