[whatwg/fetch] Simplify HeadersInit (#418)

Since Headers has an iterator now through its iterable<> declaration
there’s no real need to special case.

It might be slightly faster to have it there, but this is not
performance-critical code and I’d rather have it be simple.
You can view, comment on, or merge this pull request online at:

  https://github.com/whatwg/fetch/pull/418

-- Commit Summary --

  * Simplify HeadersInit

-- File Changes --

    M fetch.bs (18)

-- Patch Links --

https://github.com/whatwg/fetch/pull/418.patch
https://github.com/whatwg/fetch/pull/418.diff

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/whatwg/fetch/pull/418