.travis.yml in omniauth-oauth2-1.6.0 vs .travis.yml in omniauth-oauth2-1.7.0

@@ -7,11 +7,9 @@
   global:
     - JRUBY_OPTS="$JRUBY_OPTS --debug"
 language: ruby
 rvm:
   - jruby-9000
-  - 2.2.9
-  - 2.3.5
   - 2.4.4
   - 2.5.3
   - jruby-head
   - ruby-head
 matrix: