Use the root implementation for get_root_context

jedi/inference/base_value.py

@@ -27,11 +27,7 @@ class HelperValueMixin(object):
         value = self
         if value.parent_context is None:
             return value.as_context()
-
-        while True:
-            if value.parent_context is None:
-                return value
-            value = value.parent_context
+        return super(HelperValueMixin, self).get_root_context()
 
     @classmethod
     @inference_state_as_method_param_cache()