Removing meaningless comment for iterators :)

algs4/algs4/IndexMaxPQ.cs

@@ -286,7 +286,6 @@ private void Sink(int k)
         /// <summary>
         /// Returns an iterator that iterates over the keys on the
         /// priority queue in descending order.
-        /// The iterator doesn't implement remove() since it's optional.
         /// </summary>
         /// <returns>an iterator that iterates over the keys in descending order</returns>
         public IEnumerator<int> GetEnumerator()

algs4/algs4/IndexMinPQ.cs

@@ -322,7 +322,6 @@ private void Sink(int k)
         /// <summary>
         /// Returns an iterator that iterates over the keys on the
         /// priority queue in ascending order.
-        /// The iterator doesn't implement remove() since it's optional.
         /// </summary>
         /// <returns>an iterator that iterates over the keys in ascending order</returns>
         public IEnumerator<int> GetEnumerator()

algs4/algs4/MaxPQ.cs

@@ -260,7 +260,6 @@ private bool IsMaxHeap(int k)
         /// <summary>
         /// Returns an iterator that iterates over the keys on the priority queue
         /// in descending order.
-        /// The iterator doesn't implement remove() since it's optional.
         /// </summary>
         /// <returns>an iterator that iterates over the keys in descending order</returns>
         public IEnumerator<TKey> GetEnumerator()

algs4/algs4/ResizingArrayBag.cs

@@ -86,7 +86,7 @@ IEnumerator IEnumerable.GetEnumerator()
         }
 
         /// <summary>
-        /// An iterator, doesn't implement remove() since it's optional
+        /// An iterator
         /// </summary>
         private class ArrayIterator : IEnumerator<TItem>
         {