.travis.yml in liveqa-1.8.3 vs .travis.yml in liveqa-1.9.0

@@ -1,8 +1,7 @@
 cache: bundler
 language: ruby
 rvm:
-  - 2.1
   - 2.2
   - 2.3
   - 2.4
   - 2.5
 script: