chore: update azure go-autorest dependencies

Signed-off-by: David Justice <david@devigned.com>

vendor/github.com/Azure/azure-sdk-for-go/storage/appendblob.go

@@ -1,18 +1,7 @@
 package storage
 
-// Copyright 2017 Microsoft Corporation
-//
-//  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.
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
 
 import (
 	"bytes"
@@ -70,7 +59,6 @@ type AppendBlockOptions struct {
 func (b *Blob) AppendBlock(chunk []byte, options *AppendBlockOptions) error {
 	params := url.Values{"comp": {"appendblock"}}
 	headers := b.Container.bsc.client.getStandardHeaders()
-	headers["x-ms-blob-type"] = string(BlobTypeAppend)
 	headers["Content-Length"] = fmt.Sprintf("%v", len(chunk))
 
 	if options != nil {