chore: remove examples from travis

Author: kamilkisiela

.travis.yml

@@ -11,7 +11,6 @@ cache:
     - $HOME/.npm
     - $HOME/.yarn-cache
     - node_modules
-    - examples/hello-world/node_modules
 
 notifications:
   # disable email notification
@@ -24,15 +23,12 @@ before_install:
   - yarn global add coveralls
   # remove unused node modules from cache
   - npm prune
-  - (cd examples/hello-world && npm prune)
 
 install:
   - yarn
-  - (cd examples/hello-world && rm -rf node_modules/angular2-apollo && npm i)
 
 script:
   - yarn test
-  - (cd examples/hello-world && npm test)
 
 after_script:
   # send code-coverage report to coveralls