Reverted back to implicit template

Author: sanchagrins

README.md

@@ -3,7 +3,7 @@
 A barebones Django app for automating the invite process for Slack that can easily be deployed to Heroku
 ![Invite Page](./screenshots/invite-page.png)
 
-[![Deploy](https://www.herokucdn.com/deploy/button.svg)](https://heroku.com/deploy?template=https://github.com/sanchagrins/SlackInvite/tree/master/slack\_invite)
+[![Deploy](https://www.herokucdn.com/deploy/button.svg)](https://heroku.com/deploy)
 This project was inspired by the outsiders JavaScript Slack Invite Automation app.