Apply Co-Pilot suggestion

Author: tobias-tengler

src/HotChocolate/Core/src/Execution/Configuration/DefaultRequestExecutorOptionsMonitor.cs

@@ -2,19 +2,12 @@
 
 namespace HotChocolate.Execution.Configuration;
 
-internal sealed class DefaultRequestExecutorOptionsMonitor(IOptionsMonitor<RequestExecutorSetup> optionsMonitor)
+internal sealed class DefaultRequestExecutorOptionsMonitor(
+    IOptionsMonitor<RequestExecutorSetup> optionsMonitor)
     : IRequestExecutorOptionsMonitor
 {
     public RequestExecutorSetup Get(string schemaName) => optionsMonitor.Get(schemaName);
 
-    public IDisposable OnChange(Action<string> listener) => NoOpListener.Instance;
-
-    private sealed class NoOpListener : IDisposable
-    {
-        public void Dispose()
-        {
-        }
-
-        public static NoOpListener Instance { get; } = new();
-    }
+    public IDisposable? OnChange(Action<string> listener)
+        => optionsMonitor.OnChange((_, schemaName) => listener(schemaName!));
 }

src/HotChocolate/Core/src/Execution/Configuration/IRequestExecutorOptionsMonitor.cs

@@ -21,5 +21,5 @@ public interface IRequestExecutorOptionsMonitor
     /// <returns>
     /// An <see cref="IDisposable"/> which should be disposed to stop listening for changes.
     /// </returns>
-    IDisposable OnChange(Action<string> listener);
+    IDisposable? OnChange(Action<string> listener);
 }