Simplify (#23406)

The arguments are optional and not normally required

aspnetcore/tutorials/web-api-help-pages-using-swagger/samples/3.0/TodoApi.Swashbuckle/Startup2.cs

@@ -26,12 +26,8 @@ namespace TodoApi
             // Enable middleware to serve generated Swagger as a JSON endpoint.
             app.UseSwagger();
 
-            // Enable middleware to serve swagger-ui (HTML, JS, CSS, etc.),
-            // specifying the Swagger JSON endpoint.
-            app.UseSwaggerUI(c =>
-            {
-                c.SwaggerEndpoint("/swagger/v1/swagger.json", "My API V1");
-            });
+            // Enable middleware to serve swagger-ui (HTML, JS, CSS, etc.)
+            app.UseSwaggerUI();
 
             app.UseRouting();
             app.UseEndpoints(endpoints =>