message: Update remove-duplicates-from-an-unsorted-linked-list.py
diff: @@ -22,8 +22,7 @@ class Solution(object):
  while curr:
  count[curr.val] += 1
  curr = curr.next
  - dummy = ListNode(0, head)
  - curr = dummy
  + curr = dummy = ListNode(0, head)
  while curr.next:
  if count[curr.next.val] == 1:
  curr = curr.next
  