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: [42, 8.398, 40.946, 4.456, -43.635, -14.77, 89, -30.047, 6.82, -6.86, 23.821]

[42, 89]