input: 
  from typing import List
  
  
  def delete_item(items: List[str], item_to_delete: str) -> List[str]:
      """ Deletes an item from a given list if it exists and returns the updated list.
      If the item does not exist in the list, it returns the original list unmodified.
      >>> delete_item(["Apple", "Banana", "Orange"], "Banana")
      ["Apple", "Orange"]
      >>> delete_item(["Apple", "Banana", "Orange"], "Grape")
      ["Apple", "Banana", "Orange"]
      """
  
output:     if item_to_delete in items:
          items.remove(item_to_delete)
      return items