calc_profit always returns an int (TheAlgorithms#2090)

* calc_profit always returns an int

* fixup! Format Python code with psf/black push

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

greedy_method/greedy_knapsack.py

@@ -15,10 +15,9 @@
 Calculate the maximum profit that the shopkeeper can make given maxmum weight that can
 be carried.
 """
-from typing import Union
 
 
-def calc_profit(profit: list, weight: list, max_weight: int) -> Union[str, int]:
+def calc_profit(profit: list, weight: list, max_weight: int) -> int:
     """
     Function description is as follows-
     :param profit: Take a list of profits