From 5bb751ee4b0e0cd2f91affb87e0904089dca38c8 Mon Sep 17 00:00:00 2001
From: Lynn <zimu_xia@126.com>
Date: Mon, 16 Jan 2017 11:44:03 +0800
Subject: [PATCH] *: remove useless code (#2476)

---
 session.go | 13 -------------
 1 file changed, 13 deletions(-)

diff --git a/session.go b/session.go
index e0457360a5..7385fa833b 100644
--- a/session.go
+++ b/session.go
@@ -94,19 +94,6 @@ func (h *stmtHistory) add(stmtID uint32, st ast.Statement, params ...interface{}
 	h.history = append(h.history, s)
 }
 
-func (h *stmtHistory) reset() {
-	if len(h.history) > 0 {
-		h.history = h.history[:0]
-	}
-}
-
-func (h *stmtHistory) clone() *stmtHistory {
-	nh := *h
-	nh.history = make([]*stmtRecord, len(h.history))
-	copy(nh.history, h.history)
-	return &nh
-}
-
 type session struct {
 	txn    kv.Transaction // current transaction
 	txnCh  chan *txnWithErr