Break dependency on zope.broken and ZODB3.

setup.py

@@ -85,8 +85,9 @@ setup(name='zope.container',
                         'zope.size',
                         'zope.traversing',
                         'zope.publisher',
-                        'zope.broken',
-                        'ZODB3',
+                        'ZODB>=3.10',
+                        'persistent',
+                        'BTrees'
                         ],
       include_package_data = True,
       zip_safe = False,

src/zope/container/contained.py

@@ -37,12 +37,7 @@ from zope.lifecycleevent import ObjectMovedEvent
 from zope.lifecycleevent import ObjectAddedEvent
 from zope.lifecycleevent import ObjectRemovedEvent
 
-# BBB ZODB3 < 3.10
-try:
-    from ZODB.interfaces import IBroken
-except ImportError:
-    from zope.broken.interfaces import IBroken
-
+from ZODB.interfaces import IBroken
 
 @zope.interface.implementer(IContained)
 class Contained(object):