about RemoveHandler again

[sado0823]

hi @kataras , another question here !

this case can remove handler successful

func Route(r router.Party) {
                r.Use(middleware.Foo)
		r.Get("/foo", ctrl.Index).RemoveHandler(middleware.Foo)
}

but this case failed

func Route(r *iris.APIContainer) {
		sub := r.Party("/sub-r")
                sub.Use(middleware.Foo)
		sub.Get("/foo", ctrl.Index).RemoveHandler(middleware.Foo)
}

the difference is r router.Party and r *iris.APIContainer

and i find that middleware.Foo do not in r.Handlers

actually the handler that use in app.UseGlobal(...) can find in this r.Handlers ,

It bothers me a lot, and i think it is a bug, all the handlers shoud be added to []Handler

Originally posted by @sado0823 in https://github.com/kataras/iris/issues/1713#issuecomment-786394147

[sado0823]

this change the original handlers, and set it to doneHandlers, when removeHandlers, it can not find the original handlers

[sado0823]

@kataras is this a problem?