nokia: N900 doesn't really need additional inter-character time

See 46d757faa7:

gsm: send init command twice to make the N900 happy (rh #583691) (lp:765516)

for what I think is the real workaround for this bug.

plugins/mm-modem-nokia.c

@@ -58,7 +58,6 @@ grab_port (MMModem *modem,
     MMGenericGsm *gsm = MM_GENERIC_GSM (modem);
     MMPortType ptype = MM_PORT_TYPE_IGNORED;
     MMPort *port = NULL;
-    gulong send_delay = 5000;
 
     if (suggested_type == MM_PORT_TYPE_UNKNOWN) {
         if (!mm_generic_gsm_get_at_port (gsm, MM_PORT_TYPE_PRIMARY))
@@ -76,9 +75,6 @@ grab_port (MMModem *modem,
                                                mm_serial_parser_v1_e1_destroy);
     }
 
-    /* N900 appears to need longer delay between port bytes */
-    g_object_set (G_OBJECT (port), MM_SERIAL_PORT_SEND_DELAY, send_delay, NULL);
-
     return !!port;
 }