IC-718 has no PTT control

git-svn-id: https://hamlib.svn.sourceforge.net/svnroot/hamlib/trunk@2745 7ae35d74-ebe9-4afe-98af-79ac388436b8

icom/ic718.c

@@ -83,7 +83,7 @@ const struct rig_caps ic718_caps = {
 .copyright =  "LGPL",
 .status =  RIG_STATUS_BETA,
 .rig_type =   RIG_TYPE_TRANSCEIVER,
-.ptt_type =  RIG_PTT_RIG,
+.ptt_type =  RIG_PTT_NONE,
 .dcd_type =  RIG_DCD_RIG,
 .port_type =  RIG_PORT_SERIAL,
 .serial_rate_min =  300,
@@ -190,8 +190,6 @@ const struct rig_caps ic718_caps = {
 .set_mem =  icom_set_mem,
 .vfo_op =  icom_vfo_op,
 .scan =  icom_scan,
-.set_ptt =  icom_set_ptt,
-.get_ptt =  icom_get_ptt,
 .get_dcd =  icom_get_dcd,
 .set_ts =  icom_set_ts,
 .get_ts =  icom_get_ts,