Drop to tests with too old Ruby

hsbt · hsbt · commit 951c7d108af9 · 2020-12-22T16:57:00.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -4,8 +4,6 @@ language: ruby
 
 # Specify which ruby versions you wish to run your tests on, each version will be used
 rvm:
-  - 2.1
-  - 2.2
   - 2.3
   - 2.4
   - 2.5

-Original file line number
+Diff line change
 # Specify which ruby versions you wish to run your tests on, each version will be used
 rvm:
 -  - 2.1
 -  - 2.2
   - 2.3
   - 2.4
   - 2.5