Remove emsdk patch that has made it here

src/SourceBuild/patches/emsdk/0001-Move-NoTargetFrameworkFiltering-property.patch

@@ -1,39 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Nikola Milosavljevic <nikolam@microsoft.com>
-Date: Mon, 24 Apr 2023 14:00:42 +0000
-Subject: [PATCH] Move NoTargetFrameworkFiltering property
-
-Backport: https://github.com/dotnet/source-build/issues/3417
----
- Directory.Build.props | 5 +++++
- eng/SourceBuild.props | 1 -
- 2 files changed, 5 insertions(+), 1 deletion(-)
-
-diff --git a/Directory.Build.props b/Directory.Build.props
-index 69862d8..defa3f0 100644
---- a/Directory.Build.props
-+++ b/Directory.Build.props
-@@ -2,6 +2,11 @@
- <Project>
-   <Import Project="Sdk.props" Sdk="Microsoft.DotNet.Arcade.Sdk" />
- 
-+  <PropertyGroup>
-+    <!-- Emsdk doesn't support Arcade-driven target framework filtering. -->
-+    <NoTargetFrameworkFiltering>true</NoTargetFrameworkFiltering>
-+  </PropertyGroup>
-+
-   <PropertyGroup Condition="'$(StabilizePackageVersion)' == 'true'">
-     <StableVersion>$(VersionPrefix)</StableVersion>
-   </PropertyGroup>
-diff --git a/eng/SourceBuild.props b/eng/SourceBuild.props
-index 63164b2..c4009f3 100644
---- a/eng/SourceBuild.props
-+++ b/eng/SourceBuild.props
-@@ -3,7 +3,6 @@
-   <PropertyGroup>
-     <GitHubRepositoryName>emsdk</GitHubRepositoryName>
-     <SourceBuildManagedOnly>true</SourceBuildManagedOnly>
--    <NoTargetFrameworkFiltering>true</NoTargetFrameworkFiltering>
-   </PropertyGroup>
- 
- </Project>