Fix sticky Travis CI test
Fix sticky Travis CI test

this commit removes the webserver block within the box add unit test.
It's not actually needed since the test is just ensuring that if a user
adds a box name as a URL it prints a warning to the user.

taliesins/vagrant,bryson/vagrant,chrisroberts/vagrant,bryson/vagrant,sni/vagrant,mitchellh/vagrant,chrisroberts/vagrant,mitchellh/vagrant,PatrickLang/vagrant,taliesins/vagrant,bryson/vagrant,crashlytics/vagrant,PatrickLang/vagrant,marxarelli/vagrant,gitebra/vagrant,PatrickLang/vagrant,sni/vagrant,chrisroberts/vagrant,chrisroberts/vagrant,mitchellh/vagrant,marxarelli/vagrant,gitebra/vagrant,bryson/vagrant,crashlytics/vagrant,gitebra/vagrant,sni/vagrant,mitchellh/vagrant,sni/vagrant,taliesins/vagrant,PatrickLang/vagrant,marxarelli/vagrant,gitebra/vagrant,taliesins/vagrant,crashlytics/vagrant,crashlytics/vagrant,marxarelli/vagrant