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.
[21.72, 29.081, 70, -47.321, -5.478, 63, -71, -58.728, 0.873, 9.072]