Update HttpResponseJsonExtensions.cs (#42295)

Author: JamesNK

src/Http/Http.Extensions/src/HttpResponseJsonExtensions.cs

@@ -105,7 +105,6 @@ public static Task WriteAsJsonAsync<TValue>(
     /// <param name="contentType">The content-type to set on the response.</param>
     /// <param name="cancellationToken">A <see cref="CancellationToken"/> used to cancel the operation.</param>
     /// <returns>The task object representing the asynchronous operation.</returns>
-    [RequiresUnreferencedCode(RequiresUnreferencedCodeMessage)]
 #pragma warning disable RS0026 // Do not add multiple public overloads with optional parameters
     public static Task WriteAsJsonAsync<TValue>(
 #pragma warning restore RS0026 // Do not add multiple public overloads with optional parameters