diff --git a/Sample/DoNotMapClrTypeAttribute.cs b/Sample/DoNotMapClrTypeAttribute.cs
deleted file mode 100644
index 7f6a87d..0000000
--- a/Sample/DoNotMapClrTypeAttribute.cs
+++ /dev/null
@@ -1,10 +0,0 @@
-namespace Sample;
-
-/// <summary>
-/// Indicates that GetClrTypeMappings should
-/// skip this class when scanning an assembly for CLR type mappings.
-/// </summary>
-[AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
-public class DoNotMapClrTypeAttribute : Attribute
-{
-}
diff --git a/Sample/GraphTypes/MutationType.cs b/Sample/GraphTypes/MutationType.cs
index 7d0c838..b2b2995 100644
--- a/Sample/GraphTypes/MutationType.cs
+++ b/Sample/GraphTypes/MutationType.cs
@@ -15,7 +15,7 @@ public Mutation(TodoDbContext db)
         _db = db;
     }
 
-    public async Task<Todo> AddTodoAsync([Required] string title, string notes, CancellationToken cancellationToken)
+    public async Task<Todo> AddTodoAsync(string title, string notes, CancellationToken cancellationToken)
     {
         var todo = new Todo {
             Title = title,
diff --git a/Sample/RequiredAttribute.cs b/Sample/RequiredAttribute.cs
deleted file mode 100644
index ba102fc..0000000
--- a/Sample/RequiredAttribute.cs
+++ /dev/null
@@ -1,8 +0,0 @@
-using GraphQL.Types;
-
-namespace Sample;
-
-public class RequiredAttribute : GraphQL.GraphQLAttribute
-{
-    public override void Modify(TypeInformation typeInformation) => typeInformation.IsNullable = false;
-}
diff --git a/Sample/Sample.csproj b/Sample/Sample.csproj
index 2dfb55c..ccfcdbc 100644
--- a/Sample/Sample.csproj
+++ b/Sample/Sample.csproj
@@ -17,8 +17,4 @@
     <ProjectReference Include="..\src\GraphQL.DI\Shane32.GraphQL.DI.csproj" />
   </ItemGroup>
 
-  <ItemGroup>
-    <Folder Include="Services\" />
-  </ItemGroup>
-
 </Project>