Update Jellyfin.Api/Controllers/UserLibraryController.cs

Co-authored-by: Cody Robibero <cody@robibe.ro>

Jellyfin.Api/Controllers/UserLibraryController.cs

@@ -402,11 +402,7 @@ namespace Jellyfin.Api.Controllers
 
             if (user == null)
             {
-                List<Lyrics> lyricsList = new List<Lyrics>
-                {
-                    new Lyrics { Error = "User Not Found" }
-                };
-                return NotFound(new { Results = lyricsList.ToArray() });
+                return NotFound();
             }
 
             var item = itemId.Equals(default)