.travis.yml in smart_container-0.3.0 vs .travis.yml in smart_container-0.4.0

@@ -1,28 +1,21 @@
 ---
 language: ruby
 cache: bundler
+os: linux
 before_install:
 - gem install bundler -v 2.1.2
 script:
 - bundle exec rake rubocop
 - bundle exec rake rspec
 jobs:
   fast_finish: true
   include:
   - rvm: 2.4.9
-    os: [linux, osx]
   - rvm: 2.5.7
-    os: [linux, osx]
   - rvm: 2.6.5
-    os: [linux, osx]
   - rvm: 2.7.0
-    os: [linux, osx]
   - rvm: ruby-head
-    os: [linux, osx]
   - rvm: jruby-head
-    os: [linux, osx]
   allow_failures:
   - rvm: ruby-head
-    os: [linux, osx]
   - rvm: jruby-head
-    os: [linux, osx]