Update valid-parentheses/bhyun-kim.py

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

Author: sbk1014

valid-parentheses/bhyun-kim.py

@@ -37,7 +37,4 @@ def isValid(self, s: str) -> bool:
                 else:
                     return False
 
-        if len(stack) > 0:
-            return False
-        else:
-            return True
+        return len(stack) == 0