removed util

- WaitWithTimeout && SelectWithTimeout have been moved to internal/testutil
- GetTime has been moved to cnet/protocol

cnet/protocol/time.go

@@ -0,0 +1,9 @@
+package protocol
+
+import (
+	"time"
+)
+
+func GetTime() uint64 {
+	return uint64(time.Now().UnixMilli())
+}