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: [-3.044, -3.067, 36.294, -88, 17, -15, 0.68, 18, 20.336]

[-88, 17, -15, 18]