Upgrade xorm to v0.8.0 (#8536)

vendor/github.com/go-xorm/xorm/transaction.go

@@ -1,26 +0,0 @@
-// Copyright 2018 The Xorm Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package xorm
-
-// Transaction Execute sql wrapped in a transaction(abbr as tx), tx will automatic commit if no errors occurred
-func (engine *Engine) Transaction(f func(*Session) (interface{}, error)) (interface{}, error) {
-	session := engine.NewSession()
-	defer session.Close()
-
-	if err := session.Begin(); err != nil {
-		return nil, err
-	}
-
-	result, err := f(session)
-	if err != nil {
-		return nil, err
-	}
-
-	if err := session.Commit(); err != nil {
-		return nil, err
-	}
-
-	return result, nil
-}