Remove object in class definition

References: #4600
Change-Id: I2a62ddfe00bc562720f0eae700a497495d7a987a

3 files changed, 6 insertions, 6 deletions

diff --git a/lib/sqlalchemy/event/attr.py b/lib/sqlalchemy/event/attr.py
index a0c299221..77eb0472c 100644
--- a/lib/sqlalchemy/event/attr.py
+++ b/lib/sqlalchemy/event/attr.py
@@ -51,7 +51,7 @@ class RefCollection(util.MemoizedSlots):
         return weakref.ref(self, registry._collection_gced)
 
 
-class _empty_collection(object):
+class _empty_collection:
     def append(self, element):
         pass
 
diff --git a/lib/sqlalchemy/event/base.py b/lib/sqlalchemy/event/base.py
index f8cbfbd7f..b084207b4 100644
--- a/lib/sqlalchemy/event/base.py
+++ b/lib/sqlalchemy/event/base.py
@@ -38,7 +38,7 @@ def _is_event_name(name):
     ) or name.startswith("_sa_event")
 
 
-class _UnpickleDispatch(object):
+class _UnpickleDispatch:
     """Serializable callable that re-generates an instance of
     :class:`_Dispatch` given a particular :class:`.Events` subclass.
 
@@ -54,7 +54,7 @@ class _UnpickleDispatch(object):
             raise AttributeError("No class with a 'dispatch' member present.")
 
 
-class _Dispatch(object):
+class _Dispatch:
     """Mirror the event listening definitions of an Events class with
     listener collections.
 
@@ -275,7 +275,7 @@ class Events(util.with_metaclass(_EventMeta, object)):
         cls.dispatch._clear()
 
 
-class _JoinedDispatcher(object):
+class _JoinedDispatcher:
     """Represent a connection between two _Dispatch objects."""
 
     __slots__ = "local", "parent", "_instance_cls"
@@ -302,7 +302,7 @@ class _JoinedDispatcher(object):
         return self.parent._events
 
 
-class dispatcher(object):
+class dispatcher:
     """Descriptor used by target classes to
     deliver the _Dispatch class at the class level
     and produce new _Dispatch instances for target
diff --git a/lib/sqlalchemy/event/registry.py b/lib/sqlalchemy/event/registry.py
index ca85f3368..d81f27cd4 100644
--- a/lib/sqlalchemy/event/registry.py
+++ b/lib/sqlalchemy/event/registry.py
@@ -148,7 +148,7 @@ def _clear(owner, elements):
             del _key_to_collection[key]
 
 
-class _EventKey(object):
+class _EventKey:
     """Represent :func:`.listen` arguments."""
 
     __slots__ = (