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: [23.637, 6, 91, -56.858, -31.24, -1.811, 90, 67, 33.372]

[6, 91, 90, 67]