Remove unnecessary suppression (#44811)

diff --git a/src/libraries/System.Linq/src/System/Linq/DefaultIfEmpty.cs b/src/libraries/System.Linq/src/System/Linq/DefaultIfEmpty.cs
index a513a6e..593a6b8 100644 (file)
--- a/src/libraries/System.Linq/src/System/Linq/DefaultIfEmpty.cs
+++ b/src/libraries/System.Linq/src/System/Linq/DefaultIfEmpty.cs
@@ -9,7 +9,7 @@ namespace System.Linq
     public static partial class Enumerable
     {
         public static IEnumerable<TSource?> DefaultIfEmpty<TSource>(this IEnumerable<TSource> source) =>
-            DefaultIfEmpty(source, default!);
+            DefaultIfEmpty(source, default);
 
         public static IEnumerable<TSource> DefaultIfEmpty<TSource>(this IEnumerable<TSource> source, TSource defaultValue)
         {