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: [99, 91, 18.014, 33, -11.952, 20.733, -91, -4, 29.307]

[99, 91, 33, -91, -4]