Write a function remove_duplicates that takes as a parameter a sorted list of strings and that eliminates any duplicates from the list.
For example, suppose that a variable called list contains the following values: ["be", "be", "is", "not", "or", "question", "that", "the", "to", "to"]
After calling remove_duplicates(list) the list should store the following values: ["be", "is", "not", "or", "question", "that", "the", "to"]
Because the values will be sorted, all of the duplicates will be grouped together.
