.travis.yml in revealing-1.6.0 vs .travis.yml in revealing-1.7.0

@@ -1,17 +1,6 @@
 ---
 dist: xenial
 language: ruby
-cache:
-  - bundler
- directories:
-   - /home/travis/.rvm/
 before_install:
-    - gem update --system
-    - gem install bundler
-addons:
-  apt:
-    update: true
-    packages:
-      - pandoc
-      - gpp
-      - graphicsmagick
+  - gem update --system
+  - gem install bundler