input: 
  def removeDuplicates(array):
      """
      Remove duplicates from the given list of elements by using built-in functions.
      
      >>> removeDuplicates([1, 2, 2, 3, 4, 4, 5])
      [1, 2, 3, 4, 5]
      >>> removeDuplicates(['a', 'b', 'a', 'c', 'b'])
      ['a', 'b', 'c']
      >>> removeDuplicates([10, 10, 10, 10])
      [10]
      """
  
output:     return list(dict.fromkeys(array))