Revert "Adding support for user types cleanup"

This reverts commit d953002370f78293ee5e9783f60e30aa0a5336d1.

The user_defined_types view was added in 9.2 only , we shall find a workaround for that in versions below 9.2 
http://www.postgresql.org/docs/9.2/static/infoschema-user-defined-types.html

Change-Id: I6f9cf106759da4e2fb2ca632c3d8a5acf86b50a9
Signed-off-by: Eli Mesika <emesika@redhat.com>