Revert "feat: add built-in DNS server functionality with configuration toggle"

This reverts commit 8f2f960.

Author: kix

config/config.go

@@ -121,7 +121,6 @@ type Dns struct {
 	FixedDomainTtl  []KeyableString `mapstructure:"fixed_domain_ttl"`
 	Upstream        []KeyableString `mapstructure:"upstream"`
 	Routing         DnsRouting      `mapstructure:"routing"`
-	Server          DnsServerConfig `mapstructure:"server"`
 }
 
 type Routing struct {
@@ -138,12 +137,6 @@ type Config struct {
 	Dns          Dns             `mapstructure:"dns" desc:"DnsDesc"`
 }
 
-// DNS服务器配置
-type DnsServerConfig struct {
-	Enabled   bool     `mapstructure:"enabled" default:"false"`
-	Addresses []string `mapstructure:"address"`
-}
-
 // New params from sections. This func assumes merging (section "include") and deduplication for section names has been executed.
 func New(sections []*config_parser.Section) (conf *Config, err error) {
 	// Set up name to section for further use.

control/control_plane.go

@@ -45,17 +45,6 @@ import (
 	"golang.org/x/sys/unix"
 )
 
-// dialArgument contains information for DNS dialing decision
-type dialArgument struct {
-	l4proto      consts.L4ProtoStr
-	ipversion    consts.IpVersionStr
-	bestDialer   *dialer.Dialer
-	bestOutbound *outbound.DialerGroup
-	bestTarget   netip.AddrPort
-	mark         uint32
-	mptcp        bool
-}
-
 type ControlPlane struct {
 	log *logrus.Logger
 
@@ -515,15 +504,6 @@ func NewControlPlane(
 	}
 	go dnsUpstream.InitUpstreams()
 
-	// 启动DNS服务器（如果已配置）
-	if dnsConfig.Server.Enabled && len(dnsConfig.Server.Addresses) > 0 {
-		log.Infof("Starting DNS server on addresses: %v", dnsConfig.Server.Addresses)
-		if err = plane.dnsController.StartDnsServer(dnsConfig.Server.Addresses); err != nil {
-			log.WithError(err).Errorf("Failed to start DNS server")
-			// 不返回错误，允许DAE在DNS服务器启动失败时继续运行
-		}
-	}
-
 	close(plane.ready)
 	return plane, nil
 }