newprinter.py: Do not enable IPP in firewall when adding printer

It looks unnecessary to enable incoming traffic via TCP IPP port when
adjusting firewall during printer installation - local communication
happens over domain socket and if the machine acts as print server, it
will have TCP port opened already.

Author: zdohnal

newprinter.py

@@ -2306,9 +2306,6 @@ def on_firewall_read (self, data):
     def adjust_firewall_response (self, dialog, response):
         dialog.destroy ()
         if response == Gtk.ResponseType.YES:
-            ipp_server_allowed = self.firewall.check_ipp_server_allowed ()
-            if not ipp_server_allowed:
-                self.firewall.add_service (firewallsettings.IPP_SERVER_SERVICE)
             self.firewall.write ()
 
         debugprint ("Fetching network devices after firewall dialog response")