Remove platform support projects

src/Avalonia.PlatformSupport/Avalonia.PlatformSupport.csproj

@@ -1,24 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFrameworks>net6.0;net461;netstandard2.0</TargetFrameworks>
-  </PropertyGroup>
-
-  <ItemGroup>
-      <ProjectReference Include="../Avalonia.Base/Avalonia.Base.csproj" />
-      <ProjectReference Include="../Avalonia.Controls/Avalonia.Controls.csproj" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <PackageReference Include="System.Runtime.InteropServices.RuntimeInformation" Version="4.3.0" Condition="'$(TargetFramework)' == 'net461'" />
-  </ItemGroup>
-
-  <Import Project="..\..\build\NetCore.props" />
-  <Import Project="..\..\build\NetFX.props" />
-  <Import Project="..\..\build\NullableEnable.props" />
-
-  <ItemGroup>
-    <InternalsVisibleTo Include="$(AssemblyName).UnitTests, PublicKey=0024000004800000940000000602000000240000525341310004000001000100c1bba1142285fe0419326fb25866ba62c47e6c2b5c1ab0c95b46413fad375471232cb81706932e1cef38781b9ebd39d5100401bacb651c6c5bbf59e571e81b3bc08d2a622004e08b1a6ece82a7e0b9857525c86d2b95fab4bc3dce148558d7f3ae61aa3a234086902aeface87d9dfdd32b9d2fe3c6dd4055b5ab4b104998bd87" />
-    <InternalsVisibleTo Include="DynamicProxyGenAssembly2, PublicKey=0024000004800000940000000602000000240000525341310004000001000100c547cac37abd99c8db225ef2f6c8a3602f3b3606cc9891605d02baa56104f4cfc0734aa39b93bf7852f7d9266654753cc297e7d2edfe0bac1cdcf9f717241550e0a7b191195b7667bb4f64bcb8e2121380fd1d9d46ad2d92d2d15605093924cceaf74c4861eff62abf69b9291ed0a340e113be11e6a7d3113e92484cf7045cc7" />
-  </ItemGroup>
-</Project>

tests/Avalonia.PlatformSupport.UnitTests/Avalonia.PlatformSupport.UnitTests.csproj

@@ -1,24 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-    <PropertyGroup>
-        <TargetFramework>net6.0</TargetFramework>
-        <Nullable>enable</Nullable>
-        <OutputType>Library</OutputType>
-        <IsTestProject>true</IsTestProject>
-        <LangVersion>latest</LangVersion>
-    </PropertyGroup>
-
-    <Import Project="..\..\build\UnitTests.NetCore.targets" />
-    <Import Project="..\..\build\UnitTests.NetFX.props" />
-    <Import Project="..\..\build\Moq.props" />
-    <Import Project="..\..\build\XUnit.props" />
-    <Import Project="..\..\build\Rx.props" />
-    <Import Project="..\..\build\Microsoft.Reactive.Testing.props" />
-    <Import Project="..\..\build\SharedVersion.props" />
-    <ItemGroup>
-      <ProjectReference Include="..\..\src\Avalonia.Base\Avalonia.Base.csproj" />
-      <ProjectReference Include="..\..\src\Markup\Avalonia.Markup.Xaml.Loader\Avalonia.Markup.Xaml.Loader.csproj" />
-      <ProjectReference Include="..\Avalonia.UnitTests\Avalonia.UnitTests.csproj" />
-    </ItemGroup>
-
-</Project>