Delete Hello World in Google Apps Script

[rzuckerm]

Thanks for helping us build up our knowledge base! What kind of pull request have you brought us today? Please make sure to familiarize yourself with the Contributing Guide.

Pull Request Type

Please fill out this form in the following way:

[x] Right :)
[ x ] Wrong :(

Please specify the type of pull request (please only check one of these):

• [x] Sample Program Documentation
• [ ] Language Documentation
• [ ] Other (explain in the Notes section)

This pull request must have a corresponding issue number. If you have not already done so, please create a new issue.

• I fixed #625

Notes

Feel free to share any details you feel are relevant.