Remove redundant cast

Remove redundant cast identified by .NET 9 in #334.

src/ProjectEuler/Puzzles/Puzzle035.cs

@@ -26,7 +26,7 @@ internal static IList<long> GetRotations(int value)
         if (value < 12)
         {
             // The only rotation for values less than 12 is the value itself
-            return [(long)value];
+            return [value];
         }
 
         IReadOnlyList<int> digits = Maths.Digits(value);