fix lint

Yisaer · Yisaer · commit 4a73dd997150 · 2021-06-08T12:34:53.000+08:00
Signed-off-by: yisaer &lt;disxiaofei@163.com&gt;
diff --git a/testcase/stale-read/cmd/main.go b/testcase/stale-read/cmd/main.go
@@ -5,6 +5,9 @@ import (
 	"flag"
 	"time"
 
+	// use mysql
+	_ "github.com/go-sql-driver/mysql"
+
 	"github.com/pingcap/tipocket/cmd/util"
 	logs "github.com/pingcap/tipocket/logsearch/pkg/logs"
 	"github.com/pingcap/tipocket/pkg/cluster"
