bower: kill bower.json

.travis.yml

@@ -7,8 +7,6 @@ sudo: required
 dist: trusty
 
 cache:
-  directories:
-    - $HOME/.cache # includes bowers cache
   yarn: true
 
 addons:
@@ -41,13 +39,10 @@ before_install:
   - sh -e /etc/init.d/xvfb start
   - curl -o- -L https://yarnpkg.com/install.sh | bash
   - export PATH=$HOME/.yarn/bin:$PATH
-  - yarn global add bower codeclimate-test-reporter
-  - bower --version
-
+  - yarn global add codeclimate-test-reporter
 
 install:
   - yarn install --no-lockfile
-  - bower install
 
 script:
   # Usually, it's ok to finish the test scenario without reverting