fix(travis): Do not generate docs !

Previously, travis would continuously overwrite my combined docs with
the ones from the dev-project, and make them useless.

This has been driving me nuts ! Good to have it fixed !

.travis.yml

@@ -1,13 +1,4 @@
 language: rust
-after_success: |
-  [ $TRAVIS_BRANCH = master ] &&
-  [ $TRAVIS_PULL_REQUEST = false ] &&
-  cargo doc &&
-  echo '<meta http-equiv=refresh content=0;url=youtube-rs/index.html>' > target/doc/index.html &&
-  git shortlog -s -n | cut -c 8- > target/doc/humans.txt &&
-  sudo pip install ghp-import &&
-  ghp-import -n target/doc &&
-  git push -fq https://${TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages
 env:
   global:
     secure: Plj5DqAQX/4+KPM+nOAZ2sCbGIsoSrHo1YggfesQnU7paR734XO/4IayWnsNO/3q6bDi4GIcn56RUZAD3xBJJBNLia2CYIickIIYORRqLWbLdbzQaxBbD670ahtzEuUSFJTRKURPwFteAnsWYgNMNzwXOVNwLS5IUBqWTcS+N0g=