input: Write a function to delete all duplicates in a given list of numbers and return the new list containing only unique elements. If the input list is empty, return an empty list.
  def deleteDuplicates(list): 
      final_list = [] 
      for num in list: 
          if num not in final_list: 
              final_list.append(num) 
      return final_list
  
  assert deleteDuplicates([1, 2, 2, 3, 4, 4, 4, 5]) == [1, 2, 3, 4, 5]
  assert deleteDuplicates([10, 20, 30, 20, 40, 10]) == [10, 20, 30, 40]
  assert deleteDuplicates([]) == []
  assert deleteDuplicates([5, 5, 5, 5]) == [5]
  assert deleteDuplicates([1, 2, 3, 4]) == [1, 2, 3, 4]
output: def deleteDuplicates(list): 
      final_list = [] 
      for num in list: 
          if num not in final_list: 
              final_list.append(num) 
      return final_list