Reuse the InertEndpointBuilder defined in the ApplicationEndpointFactory

src/Mvc/Mvc.Core/src/ApplicationModels/DefaultApplicationModelProvider.cs

@@ -3,7 +3,6 @@
 
 using System.Linq;
 using System.Reflection;
-using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Http.Metadata;
 using Microsoft.AspNetCore.Mvc.ActionConstraints;
@@ -709,12 +708,4 @@ private static void AddRange<T>(IList<T> list, IEnumerable<T> items)
             list.Add(item);
         }
     }
-
-    private sealed class InertEndpointBuilder : EndpointBuilder
-    {
-        public override Endpoint Build()
-        {
-            return new Endpoint(RequestDelegate, new EndpointMetadataCollection(Metadata), DisplayName);
-        }
-    }
 }

src/Mvc/Mvc.Core/src/Routing/ActionEndpointFactory.cs

@@ -543,12 +543,4 @@ private static RequestDelegate CreateRequestDelegate()
             return invoker!.InvokeAsync();
         };
     }
-
-    private sealed class InertEndpointBuilder : EndpointBuilder
-    {
-        public override Endpoint Build()
-        {
-            return new Endpoint(RequestDelegate, new EndpointMetadataCollection(Metadata), DisplayName);
-        }
-    }
 }

src/Mvc/Mvc.Core/src/Routing/InertEndpointBuilder.cs

@@ -0,0 +1,15 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Http;
+
+namespace Microsoft.AspNetCore.Mvc.Routing;
+
+internal sealed class InertEndpointBuilder : EndpointBuilder
+{
+    public override Endpoint Build()
+    {
+        return new Endpoint(RequestDelegate, new EndpointMetadataCollection(Metadata), DisplayName);
+    }
+}