Fixed #4945 -- Removed unused `GET_ITERATOR_CHUNK_SIZE` definition from manager.py.  `GET_ITERATOR_CHUNK_SIZE` is already defined in query.py.  Thanks zigiDev@mac.com.
Fixed #4945 -- Removed unused `GET_ITERATOR_CHUNK_SIZE` definition from manager.py.  `GET_ITERATOR_CHUNK_SIZE` is already defined in query.py.  Thanks zigiDev@mac.com.

--HG--
extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%405743

adieu/django-nonrel,adieu/django-nonrel,adieu/django-nonrel