.travis.yml in public_suffix-4.0.5 vs .travis.yml in public_suffix-4.0.6

@@ -1,8 +1,8 @@
 language: ruby
 
 rvm:
-  - 2.3
+  # - 2.3
   - 2.4
   - 2.5
   - 2.6
   - 2.7
   - ruby-head