underscore_memoization is now even easier in fast parser

jedi/cache.py

@@ -131,19 +131,6 @@ def underscore_memoization(func):
     return wrapper
 
 
-def underscore_none_memoization(func):
-    """Like ``underscore_memoization`` just with None instead of exceptions."""
-    def wrapper(self):
-        name = '_' + func.__name__
-        value = getattr(self, name)
-        if value is None:
-            value = func(self)
-            setattr(self, name, value)
-        return value
-
-    return wrapper
-
-
 def cache_star_import(func):
     def wrapper(evaluator, scope, *args, **kwargs):
         with common.ignored(KeyError):