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.
[20, 21.076, -36.249, 38.55, -1.572, -88, -7.397, 21.512, 30.811, -7.052]