Stop generating polyfills for nullability attributes

Author: Sergio0694

src/CommunityToolkit.Mvvm.SourceGenerators/Attributes/NullabilityAttributesGenerator.cs

@@ -13,14 +13,6 @@
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
       <LogicalName>INotifyPropertyChanged.cs</LogicalName>
     </EmbeddedResource>
-    <EmbeddedResource Include="$(MSBuildThisFileDirectory)EmbeddedResources\NotNullAttribute.cs">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <LogicalName>NotNullAttribute.cs</LogicalName>
-    </EmbeddedResource>
-    <EmbeddedResource Include="$(MSBuildThisFileDirectory)EmbeddedResources\NotNullIfNotNullAttribute.cs">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <LogicalName>NotNullIfNotNullAttribute.cs</LogicalName>
-    </EmbeddedResource>
     <EmbeddedResource Include="$(MSBuildThisFileDirectory)EmbeddedResources\ObservableObject.cs">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
       <LogicalName>ObservableObject.cs</LogicalName>
@@ -31,7 +23,6 @@
     </EmbeddedResource>
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="$(MSBuildThisFileDirectory)Attributes\NullabilityAttributesGenerator.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\INotifyPropertyChangedGenerator.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\Models\AttributeInfo.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\Models\INotifyPropertyChangedInfo.cs" />

src/CommunityToolkit.Mvvm.SourceGenerators/CommunityToolkit.Mvvm.SourceGenerators.projitems

@@ -1639,7 +1639,6 @@ private static async Task VerifyAnalyzerDiagnosticsAndSuccessfulGeneration<TAnal
         IIncrementalGenerator[] generators =
         {
             new IMessengerRegisterAllGenerator(),
-            new NullabilityAttributesGenerator(),
             new ObservableObjectGenerator(),
             new INotifyPropertyChangedGenerator(),
             new ObservablePropertyGenerator(),