Create a function that takes two arguments: a list lst and a number num. If an element occurs in lst more than num times, remove the extra occurrence(s) and return the result.
delete_occurrences([1, 1, 1, 1], 2) ➞ [1, 1]
delete_occurrences([13, True, 13, None], 1) ➞ [13, True, None]
delete_occurrences([True, True, True], 3) ➞ [True, True, True]
Do not alter the order of the original list.