When querying the information schema on SQL Server 2000, removed
a CAST call that was added in 0.8.1 to help with driver issues,
which apparently is not compatible on 2000.
The CAST remains in place for SQL Server 2005 and greater.
[ticket:2747]

Conflicts:
	doc/build/changelog/changelog_09.rst
	lib/sqlalchemy/dialects/mssql/information_schema.py