Remove unused

common/conntrack/tracker.go

@@ -1,98 +0,0 @@
-package conntrack
-
-import (
-	"io"
-	"net"
-	"sync"
-
-	"github.com/sagernet/sing/common"
-	"github.com/sagernet/sing/common/bufio"
-	N "github.com/sagernet/sing/common/network"
-	"github.com/sagernet/sing/common/x/list"
-)
-
-type Tracker struct {
-	access      sync.Mutex
-	connections list.List[io.Closer]
-}
-
-func (m *Tracker) Track(conn io.Closer) *Registration {
-	m.access.Lock()
-	element := m.connections.PushBack(conn)
-	m.access.Unlock()
-	return &Registration{m, element}
-}
-
-func (m *Tracker) TrackConn(conn net.Conn) net.Conn {
-	registration := m.Track(conn)
-	return &trackConn{conn, registration}
-}
-
-func (m *Tracker) TrackPacketConn(conn net.PacketConn) N.NetPacketConn {
-	registration := m.Track(conn)
-	return &trackPacketConn{bufio.NewPacketConn(conn), registration}
-}
-
-func (m *Tracker) Reset() {
-	m.access.Lock()
-	defer m.access.Unlock()
-	for element := m.connections.Front(); element != nil; element = element.Next() {
-		common.Close(element.Value)
-	}
-	m.connections = list.List[io.Closer]{}
-}
-
-type Registration struct {
-	manager *Tracker
-	element *list.Element[io.Closer]
-}
-
-func (t *Registration) Leave() {
-	t.manager.access.Lock()
-	defer t.manager.access.Unlock()
-	t.manager.connections.Remove(t.element)
-}
-
-type trackConn struct {
-	net.Conn
-	registration *Registration
-}
-
-func (t *trackConn) Close() error {
-	t.registration.Leave()
-	return t.Conn.Close()
-}
-
-func (t *trackConn) WriteTo(w io.Writer) (n int64, err error) {
-	return bufio.Copy(w, t.Conn)
-}
-
-func (t *trackConn) ReadFrom(r io.Reader) (n int64, err error) {
-	return bufio.Copy(t.Conn, r)
-}
-
-func (t *trackConn) Upstream() any {
-	return t.Conn
-}
-
-func (t *trackConn) ReaderReplaceable() bool {
-	return true
-}
-
-func (t *trackConn) WriterReplaceable() bool {
-	return true
-}
-
-type trackPacketConn struct {
-	N.NetPacketConn
-	registration *Registration
-}
-
-func (t *trackPacketConn) Close() error {
-	t.registration.Leave()
-	return t.NetPacketConn.Close()
-}
-
-func (t *trackPacketConn) Upstream() any {
-	return t.NetPacketConn
-}

common/rw/file.go

@@ -2,11 +2,11 @@ package rw
 
 import (
 	"encoding/json"
+	"io"
 	"os"
 	"strings"
 
 	"github.com/sagernet/sing/common"
-	"io"
 )
 
 func FileExists(path string) bool {