Create a function that removes the first and last characters from a string.
remove_first_last("hello") ➞ "ell"
remove_first_last("maybe") ➞ "ayb"
remove_first_last("benefit") ➞ "enefi"
remove_first_last("a") ➞ "a"If the string is equal to or fewer than 2 characters long, return the string itself.