.travis.yml in r10k-3.10.0 vs .travis.yml in r10k-3.11.0

@@ -9,20 +9,10 @@
   - openjdk11
 before_install: gem install bundler -v '< 2' --no-document
 matrix:
   include:
     - stage: r10k tests
-      rvm: 2.7.0
-    - stage: r10k tests
-      rvm: 2.6.5
-    - stage: r10k tests
-      rvm: 2.5.0
-    - stage: r10k tests
-      rvm: 2.4.0
-    - stage: r10k tests
       rvm: 2.3.0
-    - stage: r10k tests
-      rvm: jruby
     - stage: r10k container tests
       dist: focal
       language: ruby
       services:
         - docker