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.

[-19.573, -35, 0.803, -9.937, -31.422, 26.746, 26.645, 89, 21, -39.45]
[-35, 89, 21]