Removed duplicate manifest for Visual Studio 2019 TestAgent version 16.8.31019.35. (#13237)

manifests/m/Microsoft/VisualStudio/TestAgent/16.8.31019.35/Microsoft.VisualStudio.TestAgent.yaml

@@ -1,26 +0,0 @@
-PackageIdentifier: Microsoft.VisualStudio.TestAgent
-PackageVersion: 16.8.31019.35
-PackageName: Visual Studio Test Agent
-Publisher: Microsoft Corporation
-PackageUrl: https://visualstudio.microsoft.com/
-License: Copyright (c) Microsoft Corporation. All rights reserved.
-LicenseUrl: https://visualstudio.microsoft.com/license-terms/
-Moniker: vs-testagent
-Tags:
-- C++
-- vs
-- C#
-- testagent
-Installers:
-- Architecture: x64
-  InstallerType: exe
-  InstallerUrl: https://download.visualstudio.microsoft.com/download/pr/8aaeb3c2-46bb-4444-9ca6-0361b60b2d16/9adf5ed4b8f96623489ad70b5939350014797b03ff124305692ee21451f2fc87/vs_TestAgent.exe
-  InstallerSha256: 9ADF5ED4B8F96623489AD70B5939350014797B03FF124305692EE21451F2FC87
-  InstallerSwitches:
-    Silent: --quiet
-    SilentWithProgress: --passive
-    Custom: --wait --productId Microsoft.VisualStudio.Product.TestAgent --channelId VisualStudio.16.Release --channelUri https://aka.ms/vs/16/release/channel --add Microsoft.VisualStudio.Workload.Universal
-ShortDescription: Microsoft.VisualStudio.TestAgent
-PackageLocale: en-US
-ManifestType: singleton
-ManifestVersion: 1.0.0