Fix parenthesizations.py

dotfiles/lib/python/parenthesizations.py

@@ -3,13 +3,11 @@ from backports.functools_lru_cache import lru_cache
 
 def parenthesizations(pairs):
     parenthesizations = _parenthesizations(pairs * 2, net=0)
-    return call_count, parenthesizations
+    return parenthesizations
 
 
 @lru_cache(maxsize=None)
 def _parenthesizations(length, net=0):
-    if net > length or net < 0:
-        raise Exception()
     if net == length:
         return [')' * length]
     res = prepend('(', _parenthesizations(length-1, net=net + 1))