http: remove domain specific code

Due to some changes to async tracking of http and also
in how domains are handled, it's no longer necessary
to manually copy domain from req to res in http code.

PR-URL: https://github.com/nodejs/node/pull/18477
Refs: https://github.com/nodejs/node/pull/16222


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Khaidi Chu <i@2333.moe>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>