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.
[2.371, 0.315, -68, 25, -25.631, -69.922, 20, 14.208, 2.778, 8.543, -15.913]