VMM/serviceset: Fixed a conditional ProgrammingError.
Affects only setups with Dovecot < v1.2.beta2. Actually the SQL query in
method ServiceSet._load_by_services wasn't updated.
Removed unnecessary code, which would have also produced a
ProgrammingError, if it would have been correct.
# All parameters are described in pgsql_table(5) / PGSQL PARAMETERS
#
# The hosts that Postfix will try to connect to and query from.
hosts = localhost
# The user name and password to log into the pgsql server.
user = postfix
password = some_password
# The database name on the servers.
dbname = mailsys
# XXX see create_optional_types_and_functions.pgsql
# * line 9: type sender_login
# * line 26: function postfix_smtpd_sender_login_map + comment above
#
# The SQL query template used to search the database
query = SELECT login FROM postfix_smtpd_sender_login_map('%u', '%d')