Definition: In this task you will be given a list of numbers. You should remove any number that is not an integer (whole number). If every number is not an whole number then an empty list ("[]") should be returned. Otherwise, answer with the list of whole numbers separated by comma inside brackets.
Input: [-91, -99, -61, 21.617, -42.144, -0.744, -32.262, -1.326, 91]

[-91, -99, -61, 91]