[ghstack] remove pats dependency

[panic-kbutton]

allow local config to override github graphql requests like so

[ghstack]
github_url = github.com
github_oauth = garbage
github_username = panic-kbutton

[repo]
name = myrepo
owner = myorg
id = 111111111
default_branch = main
is_fork = false

[ezyang]

Hmm, while I want to accept this PR on principle, this is not so good, it means you can only set one repo name for all ghstack uses everwhere on your machine. Any chance I can convince you to introduce a per repo configuration? :)

[panic-kbutton]

makes sense - will give that a stab!

[panic-kbutton]

thinking that with use of github_path in the ~/.ghstack config, I can add a check where, if $github_path/.ghstack exists, use that for per-repo config, otherwise assume no per-repo config exists. is that what you were thinking?

[ezyang]

There's some precedent for just chucking stuff in .git/config (using the standard git cli for modifying it.) How do you like that?