Update go dependencies (#4322)

vendor/github.com/Azure/go-autorest/autorest/version.go

@@ -1,5 +1,7 @@
 package autorest
 
+import "github.com/Azure/go-autorest/version"
+
 // Copyright 2017 Microsoft Corporation
 //
 //  Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,28 +16,7 @@ package autorest
 //  See the License for the specific language governing permissions and
 //  limitations under the License.
 
-import (
-	"fmt"
-	"runtime"
-)
-
-const number = "v11.7.1"
-
-var (
-	userAgent = fmt.Sprintf("Go/%s (%s-%s) go-autorest/%s",
-		runtime.Version(),
-		runtime.GOARCH,
-		runtime.GOOS,
-		number,
-	)
-)
-
-// UserAgent returns a string containing the Go version, system architecture and OS, and the go-autorest version.
-func UserAgent() string {
-	return userAgent
-}
-
 // Version returns the semantic version (see http://semver.org).
 func Version() string {
-	return number
+	return version.Number
 }