remove deadcode loadbalancer healthchecker

[szuecs]

remove deadcode that is not in use for a while, mark all public configuration as deprecated to delete it later

[AlexanderYastrebov]

Makes sense to also cleanup commented-out usages

skipper/proxy/proxy.go

Lines 919 to 926 in 3082a04

	ctx.proxySpan.LogKV("event", "error", "message", ensureUTF8(err.Error()))
	if perr, ok := err.(*proxyError); ok {
	//p.lb.AddHealthcheck(ctx.route.Backend)
	perr.err = fmt.Errorf("failed to do backend roundtrip to %s: %w", req.URL.Host, perr.err)
	return nil, perr
	} else if nerr, ok := err.(net.Error); ok {
	//p.lb.AddHealthcheck(ctx.route.Backend)

[szuecs]

@AlexanderYastrebov thanks for the comments, done

[AlexanderYastrebov]

👍

[szuecs]

👍