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.
[-17.641, 20, 21.261, -6.431, -17.817, 19, -1.529, -68.614, -1.267]