Don't raise an AttributeError for missing attributes

The API is prone to change, but developers often forget to document these changes
in the API docs, or add them to the clients. Removing this check makes the client
more flexible and resistent to future changes.

Author: Sam Wierema

messagebird/base.py

@@ -5,8 +5,6 @@ def load(self, data):
     for name, value in data.items():
       if hasattr(self, name):
         setattr(self, name, value)
-      else:
-        raise AttributeError("'%s' object has no attribute '%s'" % (self.__class__.__name__, name))
 
     return self