Delete .git folder

Delete .git folder in order to stop git tracking, since it is not needed on deploy step.

Author: Nedyalko Nikolov

.travis.yml

@@ -48,6 +48,7 @@ script:
 - npm run appium-android
 
 before_deploy:
+- rm -rf .git/
 - cd ../nativescript-angular
 - node ../build/travis-scripts/add-publishConfig.js next