Definition: 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.
Input: [-74.556, -10.181, 5.521, 2, 74, 28.073, 69.815, 73, -6.789]

[2, 74, 73]