Update README to remove recursion requirement

Author: Matt McCarley

README.md

@@ -71,7 +71,7 @@ Six seconds is an eternity so you've been tasked with speeding up the code. Can
 
 #### Task 3. Reverse a Linked List
 
-Inside of the `reverse` directory, you'll find a basic implementation of a Singly Linked List. _Without_ making it a Doubly Linked List (adding a tail attribute), complete the `reverse_list()` function within `reverse/reverse.py` reverse the contents of the list using recursion, *not a loop.*
+Inside of the `reverse` directory, you'll find a basic implementation of a Singly Linked List. _Without_ making it a Doubly Linked List (adding a tail attribute), complete the `reverse_list()` function within `reverse/reverse.py`.
 
 For example,
 ```