UPDATED: System.Linq.cs, DmjrsLinqExtensions

- Commented out a block of code that removes a range of items from a collection
- Updated the code to use a lambda expression instead of a foreach loop to remove items

System/System.Linq/System.Linq.cs

@@ -97,14 +97,14 @@ IEnumerable<T> removeRange
     {
         if (removeRange != null)
         {
-            if (collection is IList<T> list)
-            {
-                list.RemoveRange(removeRange);
-            }
-            else
-            {
+            // if (collection is List<T> list)
+            // {
+            //     list.RemoveRange(removeRange);
+            // }
+            // else
+            // {
                 removeRange.ForEach(item => collection.Remove(item));
-            }
+            // }
         }
         return collection;
     }