I found the following in a /var/log/secure log on a RHEL6 minimal installation:
Jul 18 22:35:01 ns3 crond[19830]: PAM adding faulty module: /lib64/security/pam_fprintd.so
Jul 18 22:35:01 ns3 crond[19831]: PAM unable to dlopen(/lib64/security/pam_fprintd.so): /lib64/security/pam_fprintd.so: cannot open shared object file: No such file or directory
To disable using the PAM module, I used the following command:
authconfig --disablefingerprint --update