[wasm] Enable System.Text.Json.SourceGeneration.Tests

Fixed by dotnet#59352 .

Fixes dotnet#59228 .

Author: radical

src/libraries/tests.proj

@@ -207,10 +207,6 @@
     <!-- https://github.com/dotnet/runtime/issues/58226 -->
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Text.Json\tests\System.Text.Json.SourceGeneration.Unit.Tests\System.Text.Json.SourceGeneration.Roslyn3.11.Unit.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Text.Json\tests\System.Text.Json.SourceGeneration.Unit.Tests\System.Text.Json.SourceGeneration.Roslyn4.0.Unit.Tests.csproj" />
-
-    <!-- https://github.com/dotnet/runtime/issues/59228 -->
-    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Text.Json\tests\System.Text.Json.SourceGeneration.Tests\System.Text.Json.SourceGeneration.Roslyn3.11.Tests.csproj" />
-    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Text.Json\tests\System.Text.Json.SourceGeneration.Tests\System.Text.Json.SourceGeneration.Roslyn4.0.Tests.csproj" />
   </ItemGroup>
 
   <!-- Aggressive Trimming related failures -->