Remove icom_set_rit - it doesn't (and can't) work - see README.icom

rigs/icom/README.icom

@@ -41,3 +41,18 @@ icr8600	3	2
 icr9000	2	2
 icr9500	3	2
 
+2020-09, G0GJV Attempting to support RIT. I asked ICOM technical support
+
+"I am doing some work on the Hamlib amateur radio control library, and in 
+particular looking at control of RIT via CI-V on the Icom IC-9100 Is my 
+reading of the manual correct - on this (and most older Icom rigs) - 
+there is no RIT/XIT control available?"
+
+and received the answer
+
+"Hi Mike,
+Yes that's right
+Thanks
+Virgil"
+
+So I've removed the erroneous icom_set_rit function.

rigs/icom/ic7100.c

@@ -360,8 +360,6 @@ const struct rig_caps ic7100_caps =
     .set_ptt =  icom_set_ptt,
     .get_ptt =  icom_get_ptt,
 
-    .set_rit =  icom_set_rit,
-
     .set_rptr_shift =  icom_set_rptr_shift,
     .get_rptr_shift =  icom_get_rptr_shift,
     .set_rptr_offs =  icom_set_rptr_offs,

rigs/icom/ic7410.c

@@ -239,8 +239,6 @@ const struct rig_caps ic7410_caps =
     .set_ant =  icom_set_ant,
     .get_ant =  icom_get_ant,
 
-    .set_rit =  icom_set_rit,
-
     .decode_event =  icom_decode_event,
     .set_level =  ic7410_set_level,
     .get_level =  ic7410_get_level,

rigs/icom/ic9100.c

@@ -252,8 +252,6 @@ const struct rig_caps ic9100_caps =
     .set_ptt =  icom_set_ptt,
     .get_ptt =  icom_get_ptt,
 
-    .set_rit =  icom_set_rit,
-
     .set_rptr_shift =  icom_set_rptr_shift,
     .get_rptr_shift =  icom_get_rptr_shift,
     .set_rptr_offs =  icom_set_rptr_offs,

rigs/icom/icom.c

@@ -1256,37 +1256,6 @@ int icom_get_freq(RIG *rig, vfo_t vfo, freq_t *freq)
     return RIG_OK;
 }
 
-int icom_set_rit(RIG *rig, vfo_t vfo, shortfreq_t rit)
-{
-    unsigned char freqbuf[MAXFRAMELEN], ackbuf[MAXFRAMELEN];
-    int freq_len, ack_len = sizeof(ackbuf), retval;
-
-
-    rig_debug(RIG_DEBUG_VERBOSE, "%s called\n", __func__);
-    freq_len = 2;
-    /*
-     * to_bcd requires nibble len
-     */
-    to_bcd(freqbuf, rit, freq_len * 2);
-
-    retval = icom_transaction(rig, C_SET_OFFS, -1, freqbuf, freq_len,
-                              ackbuf, &ack_len);
-
-    if (retval != RIG_OK)
-    {
-        return retval;
-    }
-
-    if (ack_len != 1 || ackbuf[0] != ACK)
-    {
-        rig_debug(RIG_DEBUG_ERR, "%s: ack NG (%#.2x), len=%d\n", __func__,
-                  ackbuf[0], ack_len);
-        return -RIG_ERJCTED;
-    }
-
-    return RIG_OK;
-}
-
 int icom_get_rit_new(RIG *rig, vfo_t vfo, shortfreq_t *ts)
 {
     unsigned char tsbuf[MAXFRAMELEN];

rigs/icom/icom.h

@@ -222,7 +222,6 @@ int icom_rig_close(RIG *rig);
 int icom_cleanup(RIG *rig);
 int icom_set_freq(RIG *rig, vfo_t vfo, freq_t freq);
 int icom_get_freq(RIG *rig, vfo_t vfo, freq_t *freq);
-int icom_set_rit(RIG *rig, vfo_t vfo, shortfreq_t rit);
 int icom_get_rit_new(RIG *rig, vfo_t vfo, shortfreq_t *ts);
 int icom_set_rit_new(RIG *rig, vfo_t vfo, shortfreq_t ts);
 int icom_set_xit_new(RIG *rig, vfo_t vfo, shortfreq_t ts);

rigs/icom/x108g.c

@@ -271,8 +271,6 @@ const struct rig_caps x108g_caps =
     .set_ant =  NULL,  /*automatically set by rig depending band */
     .get_ant =  NULL,
 
-    .set_rit =  icom_set_rit,
-
     .decode_event =  icom_decode_event,
     .set_level =  icom_set_level,
     .get_level =  icom_get_level,