Update remove_duplicates.py

Author: srikar-eranky

2_intermediate/chapter11/practice/remove_duplicates.py

@@ -3,10 +3,11 @@
 # The function should look through a list,
 # Find all duplicate elements, and remove them
 # Sort the resulting list
-# YOU MAY NOT USE THE set() function IN PYTHON. Use this problem to practice list iteration!
+# YOU MAY NOT USE THE set() function IN PYTHON.
 # Hint: To sort a list, use sorted(list)
-# Another hint: Use list.count(element)
-# To count the number of times that element appears
+# Another hint: Use dict.removekeys(list)
+# To take the elements from a list,
+# and convert them to keys in a dictionary
 
 # Example: array = [1,1,2,5,4,6,12,3,4,6]
 # Result should print [1,2,3,4,5,6,12]