Fix the issue

Olive/-Extensions/Linq.cs

@@ -374,29 +374,6 @@ public static void Do<T>(this IEnumerable<T> @this, Action<T, int> action)
             }
         }
 
-        /// <summary>
-        /// Performs an action for all items within the list.
-        /// </summary>        
-        public static Task DoAsync<T>(this IEnumerable<T> @this, Func<T, Task> action)
-            => @this.DoAsync((x, i) => action(x));
-
-        /// <summary>
-        /// Performs an action for all items within the list.
-        /// It will provide the index of the item in the list to the action handler as well.
-        /// </summary>        
-        public static async Task DoAsync<T>(this IEnumerable<T> @this, Func<T, int, Task> action)
-        {
-            if (@this == null || action == null) return;
-
-            var index = 0;
-
-            foreach (var item in @this)
-            {
-                await action(item, index).ConfigureAwait(false);
-                index++;
-            }
-        }
-
         /// <summary>
         /// Performs an action for all items within the list.
         /// </summary>