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: [21, -18.281, 73, -10.514, -2.211, 46, -40, 2.339]

[21, 73, 46, -40]