input: Write a function to remove duplicate entries from a list. The function should return a new list with all duplicates removed. If the input list is empty, the function should return an empty list.
  assert removeDuplicates([1, 2, 2, 3, 3, 4]) == [1, 2, 3, 4]
  assert removeDuplicates([1, 1, 1, 1]) == [1]
  assert removeDuplicates([]) == []
output: def removeDuplicates(lst):
      return list(set(lst))