Remove current implementation of SponsorLink for now

Now that SponsorLink is OSS and based on received feedback
it will change in many ways moving forward, we'll for now
remove the current implementation from the package to address
the issues that were raised.

See https://github.com/devlooped/SponsorLink

Author: kzu

src/NuGetizer.Tasks/NuGetizer.Shared.targets

@@ -18,7 +18,7 @@ Copyright (c) .NET Foundation. All rights reserved.
   <!-- Adds compatibility targets with Pack SDK -->
   <Import Project="NuGetizer.Compatibility.props" />
   <!-- Adds CodeAnalysis props and items needed for diagnostics -->
-  <Import Project="NuGetizer.CodeAnalysis.targets" />
+  <!--<Import Project="NuGetizer.CodeAnalysis.targets" />-->
 
   <ItemGroup>
     <!-- NuGetizer should *always* be a private asset. This avoids SL checks on P2P scenarios. -->

src/NuGetizer.Tasks/NuGetizer.Tasks.csproj

@@ -24,8 +24,8 @@
     <PackageReference Include="NuGet.Packaging" Version="6.3.0" PrivateAssets="all" />
     <PackageReference Include="NuGet.ProjectManagement" Version="4.2.0" PrivateAssets="all" />
     <PackageReference Include="PolySharp" Version="1.13.1" PrivateAssets="all" />
-    <PackageReference Include="ThisAssembly.Project" Version="1.3.0" PrivateAssets="all" />
-    <PackageReference Include="ThisAssembly.Strings" Version="1.3.0" PrivateAssets="all" />
+    <PackageReference Include="ThisAssembly.Project" Version="1.4.0" PrivateAssets="all" />
+    <PackageReference Include="ThisAssembly.Strings" Version="1.4.0" PrivateAssets="all" />
     <PackageReference Include="Minimatch" Version="2.0.0" PrivateAssets="all" />
   </ItemGroup>
 
@@ -42,7 +42,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\CodeAnalysis\CodeAnalysis.csproj" ReferenceOutputAssembly="false" />
+    <!--<ProjectReference Include="..\CodeAnalysis\CodeAnalysis.csproj" ReferenceOutputAssembly="false" />-->
   </ItemGroup>
 
   <ItemGroup>