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