Can I disable PAM auth if all my username/password lookups are via a database connection?

I would love to get rid of the following lines in my logs...

Oct 17 14:32:14 auth-worker(7809): Info: pam(xxx-xxx-xxx,111.111.111.111,<sdfhgsdfgsd>): pam_authenticate() failed: Authentication failure (password mismatch?)

Cheers.