#x-ipfs-companion-no-redirect opt-out does not work in 3.0.0

[lidel]

The #x-ipfs-companion-no-redirect opt-out described in https://github.com/ipfs/ipfs-companion#toggle-redirects-globally-or-per-site does not seem to work anymore

• http://en.wikipedia-on-ipfs.org.ipns.localhost:8080/wiki/#x-ipfs-companion-no-redirect
  • redirects to http://en.wikipedia-on-ipfs.org.ipns.localhost:8080/wiki/

@whizzzkid not sure if this works, or is worth supporting in MV3.
If not, maybe we should remove it from readme and docs?

I think the opt-out is used on https://ipfs.github.io/public-gateway-checker/ but if we no longer redirect subresources (only top-level documents), we could remove it from URLs there too.