Delete redundant caches for EmptyHttpResult (#63485)

Author: jkotas

src/Http/Http.Results/src/Results.cs

@@ -1025,7 +1025,7 @@ public static IResult ServerSentEvents<T>(IAsyncEnumerable<SseItem<T>> values)
     /// <summary>
     /// Produces an empty result response, that when executed will do nothing.
     /// </summary>
-    public static IResult Empty { get; } = TypedResults.Empty;
+    public static IResult Empty => EmptyHttpResult.Instance;
 
     /// <summary>
     /// Provides a container for external libraries to extend

src/Http/Http.Results/src/TypedResults.cs

@@ -1115,7 +1115,7 @@ public static ServerSentEventsResult<T> ServerSentEvents<T>(IAsyncEnumerable<Sse
     /// <summary>
     /// Produces an empty result response, that when executed will do nothing.
     /// </summary>
-    public static EmptyHttpResult Empty { get; } = EmptyHttpResult.Instance;
+    public static EmptyHttpResult Empty => EmptyHttpResult.Instance;
 
     /// <summary>
     /// Provides a container for external libraries to extend