parse_qs moved to urlparse

In Python 2.6 parse_qs was copied from cgi to urlparse modules.  Thus we
remove the try clauses that attempt to import from cgi.

Ref: http://docs.python.org/2/library/cgi.html#cgi.parse_qs
and http://docs.python.org/2/library/urlparse.html#urlparse.parse_qs