Flake8: Drop ignore of issue A003 (#7949)

* Flake8: Drop ignore of issue A003

* updating DIRECTORY.md

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

data_structures/heap/heap.py

@@ -88,13 +88,6 @@ class Heap:
             for i in range(self.heap_size // 2 - 1, -1, -1):
                 self.max_heapify(i)
 
-    def max(self) -> float:
-        """return the max in the heap"""
-        if self.heap_size >= 1:
-            return self.h[0]
-        else:
-            raise Exception("Empty heap")
-
     def extract_max(self) -> float:
         """get and remove max from heap"""
         if self.heap_size >= 2: