remove unnecessary ok
diff --git a/clientconn.go b/clientconn.go
index 9359366..e69ba46 100644
--- a/clientconn.go
+++ b/clientconn.go
@@ -670,7 +670,7 @@
 	m, ok := cc.sc.Methods[method]
 	if !ok {
 		i := strings.LastIndex(method, "/")
-		m, ok = cc.sc.Methods[method[:i+1]]
+		m, _ = cc.sc.Methods[method[:i+1]]
 	}
 	return m
 }