Deprecate automatic repository field

It is much better to just use one for the manual and automatic packages.

This states the suggestion already stated in https://github.com/chocolatey/chocolateytemplates/blob/master/README.md:
> It is not recommended to use separate repositories for manual and automatic packages.

By the way: The source files of this repository contain a mix of end-of-line characters (even a mix of CR and CRLF in the same file). Which crappy editor did this? :suspect: