input: Write a python function to remove duplicates from a list.
  assert removeDuplicates([1, 2, 4, 4, 1, 5, 2]) == [1, 2, 4, 5]
  assert removeDuplicates([10, 10, 20, 30, 20, 30]) == [10, 20, 30]
  assert removeDuplicates([7, 8, 8, 7, 9, 10]) == [7, 8, 9, 10]
output: def removeDuplicates(lst):
      return list(dict.fromkeys(lst))