You cannot use Python builtins. you must use StaticArray to accomplish this. StaticArrays have 3 methods, get, set, size. You must specify the size of the StaticArray when u initialize it, like:

arr = StaticArray(10) <-- size 10 StaticArray

 def remove_duplicates(arr: StaticArray) -> StaticArray: """ Returns a new StaticArray with duplicate values removed. """