Project's bug tracker should be on GitHub

[vi]

It is too cumbersome to register in a dedicated Bugzilla for every little project.

Users with Github accounts should be able to just create an issue right away.

If the project has strict policy about non-usage for Github's bug tracker, you should configure the github project to have no issue management (Admin -> Options -> Issues).

IMHO duplication of issue trackers is not a good idea. It is better to decide which tracker to use while them both are empty.