chore: clean up code

context/conn.go

@@ -1,9 +1,9 @@
 package context
 
 import (
+	CN "github.com/Dreamacro/clash/common/net"
 	"net"
 
-	CN "github.com/Dreamacro/clash/common/net"
 	C "github.com/Dreamacro/clash/constant"
 	"github.com/gofrs/uuid"
 )
@@ -17,14 +17,10 @@ type ConnContext struct {
 func NewConnContext(conn net.Conn, metadata *C.Metadata) *ConnContext {
 	id, _ := uuid.NewV4()
 
-	if _, ok := conn.(*CN.BufferedConn); !ok {
-		conn = CN.NewBufferedConn(conn)
-	}
-
 	return &ConnContext{
 		id:       id,
 		metadata: metadata,
-		conn:     conn,
+		conn:     CN.NewBufferedConn(conn),
 	}
 }