don't use pool to allocate buffers

pkg/util/pool/pool.go

@@ -1,34 +0,0 @@
-/*
-Copyright 2017 The GoStor Authors All rights reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-// Package pool provides memory pool for buffer.
-package pool
-
-import "sync"
-
-var bytePool sync.Pool = sync.Pool{}
-
-func NewBuffer(size int) []byte {
-	bytePool.New = func() interface{} {
-		return make([]byte, size)
-	}
-
-	return bytePool.Get().([]byte)
-}
-
-func ReleaseBuffer(b []byte) {
-	bytePool.Put(b)
-}