input: Write a function to remove duplicate entries from a list and return the modified list.
  def removeDuplicates(input): 
      final_list = [] 
      for num in input: 
          if num not in final_list: 
              final_list.append(num) 
      return final_list 
  
  assert removeDuplicates([1,2,2,3,3,4])==[1,2,3,4]
  assert removeDuplicates([4,4,4,4])==[4]
  assert removeDuplicates([])==[]
  assert removeDuplicates([1])==[1]
  assert removeDuplicates([1,2,3,4,5])==[1,2,3,4,5]
output: def removeDuplicates(input): 
      final_list = [] 
      for num in input: 
          if num not in final_list: 
              final_list.append(num) 
      return final_list