Remove project reference. Want to model this as a package dependency only, not a compile-time dependency in sources.

Author: SteveSandersonMS

eng/ProjectReferences.props

@@ -6,7 +6,6 @@
 <Project>
   <ItemGroup>
     <ProjectReferenceProvider Include="Microsoft.AspNetCore.Components.WebAssembly.Build" ProjectPath="$(RepoRoot)src\Components\WebAssembly\Build\src\Microsoft.AspNetCore.Components.WebAssembly.Build.csproj"  />
-    <ProjectReferenceProvider Include="Microsoft.AspNetCore.Components.WebAssembly.DebugProxy" ProjectPath="$(RepoRoot)src\Components\WebAssembly\DebugProxy\src\Microsoft.AspNetCore.Components.WebAssembly.DebugProxy.csproj"  />
     <ProjectReferenceProvider Include="Microsoft.AspNetCore.Blazor.HttpClient" ProjectPath="$(RepoRoot)src\Components\WebAssembly\Http\src\Microsoft.AspNetCore.Blazor.HttpClient.csproj"  />
     <ProjectReferenceProvider Include="WebAssembly.JSInterop" ProjectPath="$(RepoRoot)src\Components\WebAssembly\JSInterop\src\WebAssembly.JSInterop.csproj"  />
     <ProjectReferenceProvider Include="Microsoft.AspNetCore.Components.WebAssembly.Server" ProjectPath="$(RepoRoot)src\Components\WebAssembly\Server\src\Microsoft.AspNetCore.Components.WebAssembly.Server.csproj"  />

src/Components/WebAssembly/DebugProxy/src/Microsoft.AspNetCore.Components.WebAssembly.DebugProxy.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>$(DefaultNetCoreTargetFramework)</TargetFramework>
@@ -7,6 +7,8 @@
     <IsShippingPackage>true</IsShippingPackage>
     <HasReferenceAssembly>false</HasReferenceAssembly>
     <Description>Debug proxy for use when building Blazor applications.</Description>
+    <!-- Set this to false because assemblies should not reference this assembly directly, (except for tests, of course). -->
+    <IsProjectReferenceProvider>false</IsProjectReferenceProvider>
 
     <!-- This is so that we add the FrameworkReference to Microsoft.AspNetCore.App -->
     <UseLatestAspNetCoreReference>true</UseLatestAspNetCoreReference>

src/Components/WebAssembly/Server/src/Microsoft.AspNetCore.Components.WebAssembly.Server.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>$(DefaultNetCoreTargetFramework)</TargetFramework>
@@ -13,8 +13,4 @@
     <Compile Include="$(ComponentsSharedSourceRoot)\src\CacheHeaderSettings.cs" Link="Shared\CacheHeaderSettings.cs" />
   </ItemGroup>
 
-  <ItemGroup>
-    <Reference Include="Microsoft.AspNetCore.Components.WebAssembly.DebugProxy" />
-  </ItemGroup>
-
 </Project>