Update valid-parentheses/gcount85.py

Co-authored-by: Dale Seo <5466341+DaleSeo@users.noreply.github.com>

Author: jamiebase

valid-parentheses/gcount85.py

@@ -20,6 +20,4 @@ def isValid(self, s: str) -> bool:
                 continue
             if not stack or brackets[stack.pop()] != b:
                 return False
-        if not stack:
-            return True
-        return False
+        return not stack