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: [-2.424, 4, -24.058, -51.474, -39.212, -3.628, -34.678, 24.351, 21, 6.676]

[4, 21]