From 44d3e6d4ace3940bc98b51e52338cde7e293ae09 Mon Sep 17 00:00:00 2001
From: ZhangJan <dsonet@msn.com>
Date: Sun, 5 Jun 2016 01:19:54 +0800
Subject: [PATCH] remove a needless if.

Since always remove the old class.
---
 src/directives/internal/transition.js | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/directives/internal/transition.js b/src/directives/internal/transition.js
index 6815a2bd87f..0069567fcf3 100644
--- a/src/directives/internal/transition.js
+++ b/src/directives/internal/transition.js
@@ -13,9 +13,7 @@ export default {
     id = id || 'v'
     oldId = oldId || 'v'
     el.__v_trans = new Transition(el, id, hooks, this.vm)
-    if (oldId) {
-      removeClass(el, oldId + '-transition')
-    }
+    removeClass(el, oldId + '-transition')
     addClass(el, id + '-transition')
   }
 }