diff --git a/core/src/main/golang/main.go b/core/src/main/golang/main.go
index a3edd94..38dd16d 100644
--- a/core/src/main/golang/main.go
+++ b/core/src/main/golang/main.go
@@ -1,33 +1,3 @@
 package main
 
-import (
-	"io/ioutil"
-	"net"
-	"os"
-
-	"github.com/Dreamacro/clash/component/mmdb"
-)
-
-func main() {
-	f, err := os.Open("./Country.mmdb")
-	if err != nil {
-		println(err)
-		return
-	}
-
-	buf, err := ioutil.ReadAll(f)
-	if err != nil {
-		println(err)
-		return
-	}
-
-	mmdb.LoadFromBytes(buf)
-
-	c, err := mmdb.Instance().Country(net.ParseIP("114.114.114.114"))
-	if err != nil {
-		println(err)
-		return
-	}
-
-	println(c.Country.IsoCode)
-}
+func main() {}