Remove a sold-out item
Write remove_item(items, item) that removes item from the list if it is
there, and leaves the list alone if it is not. If item appears more than
once, remove only the first one. Change the list itself and return it.
remove_item(["apple", "bread", "milk"], "bread") -> ["apple", "milk"]
remove_item(["apple", "milk"], "eggs") -> ["apple", "milk"]
remove_item(["a", "b", "a"], "a") -> ["b", "a"]
def remove_item(items, item):
...