Remove backported source-build runtime patch

src/SourceBuild/patches/runtime/0001-Fix-for-item-based-msbuild-pattern.patch

@@ -1,29 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Michael Simons <msimons@microsoft.com>
-Date: Wed, 1 Mar 2023 00:08:32 +0000
-Subject: [PATCH] Fix for item-based msbuild pattern
-
-Backport: https://github.com/dotnet/runtime/issues/82795
----
- src/tasks/Crossgen2Tasks/Microsoft.NET.CrossGen.targets | 8 +++++++-
- 1 file changed, 7 insertions(+), 1 deletion(-)
-
-diff --git a/src/tasks/Crossgen2Tasks/Microsoft.NET.CrossGen.targets b/src/tasks/Crossgen2Tasks/Microsoft.NET.CrossGen.targets
-index 251336540b5..72a3537a5ce 100644
---- a/src/tasks/Crossgen2Tasks/Microsoft.NET.CrossGen.targets
-+++ b/src/tasks/Crossgen2Tasks/Microsoft.NET.CrossGen.targets
-@@ -346,7 +346,13 @@ Copyright (c) .NET Foundation. All rights reserved.
-                             _CreateR2RImages;
-                             _CreateR2RSymbols">
- 
--    <AllowEmptyTelemetry EventName="ReadyToRun" EventData="PublishReadyToRunUseCrossgen2=$(PublishReadyToRunUseCrossgen2);Crossgen2PackVersion=%(ResolvedCrossgen2Pack.NuGetPackageVersion);CompileListCount=@(_ReadyToRunCompileList->Count());FailedCount=@(_ReadyToRunCompilationFailures->Count())" />
-+    <ItemGroup>
-+       <_R2RCrossgenTelemetry Include="PublishReadyToRunUseCrossgen2" Value="$(PublishReadyToRunUseCrossgen2)" />
-+       <_R2RCrossgenTelemetry Include="Crossgen2PackVersion" Value="%(ResolvedCrossgen2Pack.NuGetPackageVersion)" />
-+       <_R2RCrossgenTelemetry Include="CompileListCount" Value="@(_ReadyToRunCompileList->Count())" />
-+       <_R2RCrossgenTelemetry Include="FailedCount" Value="@(_ReadyToRunCompilationFailures->Count())" />
-+    </ItemGroup>
-+    <AllowEmptyTelemetry EventName="ReadyToRun" EventData="@(_R2RCrossgenTelemetry)" />
- 
-     <NETSdkError Condition="'@(_ReadyToRunCompilationFailures)' != ''" ResourceName="ReadyToRunCompilationFailed" />
-