Removed duplicate manifest for Visual Studio 2019 BuildTools version 16.9.31112.23. (#13143)

manifests/m/Microsoft/VisualStudio/BuildTools/16.9.31112.23/Microsoft.VisualStudio.BuildTools.yaml

@@ -1,26 +0,0 @@
-PackageIdentifier: Microsoft.VisualStudio.BuildTools
-PackageVersion: 16.9.31112.23
-PackageName: Visual Studio Build Tools
-Publisher: Microsoft
-License: Copyright (c) Microsoft Corporation. All rights reserved.
-LicenseUrl: https://visualstudio.microsoft.com/license-terms/
-Tags:
-- C++
-- tools
-- C#
-- build
-- vs
-ShortDescription: Visual Studio Build Tools
-PackageUrl: https://visualstudio.microsoft.com/
-Installers:
-- Architecture: x64
-  InstallerUrl: https://download.visualstudio.microsoft.com/download/pr/1192d0de-5c6d-4274-b64d-c387185e4f45/605089bf72da4da4d27eb0cfcec569ed61f5cf5671aa6d3dece1487abfd62cab/vs_BuildTools.exe
-  InstallerSha256: 605089BF72DA4DA4D27EB0CFCEC569ED61F5CF5671AA6D3DECE1487ABFD62CAB
-  InstallerType: exe
-  InstallerSwitches:
-    Silent: --quiet
-    SilentWithProgress: --passive
-    Custom: --productId Microsoft.VisualStudio.Product.BuildTools --channelId VisualStudio.16.Release --channelUri https://aka.ms/vs/16/release/channel
-PackageLocale: en-US
-ManifestType: singleton
-ManifestVersion: 1.0.0