postfix: remove redundant config

postfix/files/master.cf

@@ -18,9 +18,6 @@ smtp      inet  n       -       y       -       -       smtpd
 #tlsproxy  unix  -       -       y       -       0       tlsproxy
 submission inet n       -       y       -       -       smtpd 
 #  -o smtpd_tls_security_level=encrypt
-  -o smtpd_sasl_auth_enable=yes
-  -o smtpd_sasl_type=dovecot
-  -o smtpd_sasl_path=private/auth
   -o smtpd_sasl_security_options=noanonymous
   -o smtpd_sasl_local_domain=$myhostname
   -o smtpd_client_restrictions=permit_sasl_authenticated,reject