next.js

224ca189 - remove unnecessary internal middleware header from response (#73482)

remove unnecessary internal middleware header from response (#73482) x-middleware-set-cookie is an internal header used by the middleware handler and doesn't need to be forwarded onto the response. this also adds handling to filter out internal request headers as they aren't intended to be used externally. --------- Co-authored-by: JJ Kasper <jj@jjsweb.site>