Revert "Least load balancer (XTLS#2999)"

This reverts commit fa5d7a2.

Author: ttc0419

app/commander/config.pb.go

@@ -230,7 +230,6 @@ func (d *DefaultDispatcher) Dispatch(ctx context.Context, destination net.Destin
 		content = new(session.Content)
 		ctx = session.ContextWithContent(ctx, content)
 	}
-
 	sniffingRequest := content.SniffingRequest
 	inbound, outbound := d.getLink(ctx)
 	if !sniffingRequest.Enabled {
@@ -367,6 +366,7 @@ func sniffer(ctx context.Context, cReader *cachedReader, metadataOnly bool, netw
 	}
 	return contentResult, contentErr
 }
+
 func (d *DefaultDispatcher) routedDispatch(ctx context.Context, link *transport.Link, destination net.Destination) {
 	ob := session.OutboundFromContext(ctx)
 	if hosts, ok := d.dns.(dns.HostsLookup); ok && destination.Address.Family().IsDomain() {