Revert "The Test App for Microsoft.Windows.Storage.Pickers (#6195)" (#6287)

Reverts #6195

This change is causing failures in the OneBranch Nightly build pipeline that our PR build didn't catch
https://microsoft.visualstudio.com/ProjectReunion/_build/results?buildId=141685350&view=results

Attempt to fix it here but running into too many blocks
#6286

Author: kythant

WindowsAppRuntime.sln

@@ -755,8 +755,6 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Deployment.WindowsAppRuntim
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Deployment.WindowsAppRuntime.Test.SingletonLowerVersion", "test\Deployment\data\WindowsAppRuntime.Test.SingletonLowerVersion\WindowsAppRuntime.Test.SingletonLowerVersion.vcxproj", "{7A3C8F5D-9B2E-4A1F-8D6C-3E9F7B4A2C1D}"
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "StoragePickersTestApp", "test\TestApps\StoragePickersTestApp\StoragePickersTestApp.vcxproj", "{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}"
-EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -2667,30 +2665,6 @@ Global
 		{7A3C8F5D-9B2E-4A1F-8D6C-3E9F7B4A2C1D}.Release|x64.Build.0 = Release|x64
 		{7A3C8F5D-9B2E-4A1F-8D6C-3E9F7B4A2C1D}.Release|x86.ActiveCfg = Release|Win32
 		{7A3C8F5D-9B2E-4A1F-8D6C-3E9F7B4A2C1D}.Release|x86.Build.0 = Release|Win32
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Debug|Any CPU.ActiveCfg = Debug|x64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Debug|Any CPU.Build.0 = Debug|x64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Debug|Any CPU.Deploy.0 = Debug|x64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Debug|ARM64.ActiveCfg = Debug|ARM64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Debug|ARM64.Build.0 = Debug|ARM64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Debug|ARM64.Deploy.0 = Debug|ARM64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Debug|x64.ActiveCfg = Debug|x64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Debug|x64.Build.0 = Debug|x64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Debug|x64.Deploy.0 = Debug|x64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Debug|x86.ActiveCfg = Debug|Win32
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Debug|x86.Build.0 = Debug|Win32
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Debug|x86.Deploy.0 = Debug|Win32
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Release|Any CPU.ActiveCfg = Release|x64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Release|Any CPU.Build.0 = Release|x64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Release|Any CPU.Deploy.0 = Release|x64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Release|ARM64.ActiveCfg = Release|ARM64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Release|ARM64.Build.0 = Release|ARM64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Release|ARM64.Deploy.0 = Release|ARM64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Release|x64.ActiveCfg = Release|x64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Release|x64.Build.0 = Release|x64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Release|x64.Deploy.0 = Release|x64
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Release|x86.ActiveCfg = Release|Win32
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Release|x86.Build.0 = Release|Win32
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F}.Release|x86.Deploy.0 = Release|Win32
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -2919,7 +2893,6 @@ Global
 		{06AA7FD7-36BE-41AC-9008-56919D1612C6} = {3B706C5C-55E0-4B76-BF59-89E20FE46795}
 		{462CF10A-E6B5-4005-8E25-132D1DE589B7} = {2B653A15-2482-40E5-9509-C531E69D0749}
 		{7A3C8F5D-9B2E-4A1F-8D6C-3E9F7B4A2C1D} = {2B653A15-2482-40E5-9509-C531E69D0749}
-		{D1310DE7-70EC-4B6A-8A78-2A31BCFA037F} = {AC5FFC80-92FE-4933-BED2-EC5519AC4440}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {4B3D7591-CFEC-4762-9A07-ABE99938FB77}