Fix unused cppcheck warnings

https://github.com/Hamlib/Hamlib/issues/1351

rigs/yaesu/ft600.c

@@ -87,18 +87,18 @@ enum ft600_native_cmd_e
  */
 typedef struct
 {
-    unsigned char band_no;
+//    unsigned char band_no;
     unsigned char freq[16];
-    unsigned char mode;
+//    unsigned char mode;
-    unsigned char ctcss;
+//    unsigned char ctcss;
-    unsigned char dcs;
+//    unsigned char dcs;
-    unsigned char flag1;
+//    unsigned char flag1;
-    unsigned char flag2;
+//    unsigned char flag2;
-    unsigned char clarifier[2];
+//    unsigned char clarifier[2];
-    unsigned char not_used;
+//    unsigned char not_used;
-    unsigned char step1;
+//    unsigned char step1;
-    unsigned char step2;
+//    unsigned char step2;
-    unsigned char filter;
+//    unsigned char filter;
 
 // cppcheck-suppress *
     unsigned char stuffing[16];

rotators/satel/satel.c

@@ -98,9 +98,9 @@ typedef struct satel_stat satel_stat_t;
 struct satel_stat
 {
     bool   motion_enabled;
-    int    mode;
+//    int    mode;
-    time_t time;
+//    time_t time;
-    int    absolute;
+//    int    absolute;
     int    az;
     int    el;
 };

simulators/simft736.c

@@ -88,9 +88,6 @@ int openPort(char *comport) // doesn't matter for using pts devices
 int main(int argc, char *argv[])
 {
     unsigned char buf[256];
-    unsigned char *pbuf;
-    int n;
-
 
 again:
     int fd = openPort(argv[1]);

simulators/simft817.c

@@ -88,7 +88,6 @@ int openPort(char *comport) // doesn't matter for using pts devices
 int main(int argc, char *argv[])
 {
     unsigned char buf[256];
-    unsigned char *pbuf;
     int n;
 
 

simulators/simft847.c

@@ -88,7 +88,6 @@ int openPort(char *comport) // doesn't matter for using pts devices
 int main(int argc, char *argv[])
 {
     unsigned char buf[256];
-    unsigned char *pbuf;
     int n;
 
 

simulators/simft897.c

@@ -88,7 +88,6 @@ int openPort(char *comport) // doesn't matter for using pts devices
 int main(int argc, char *argv[])
 {
     unsigned char buf[256];
-    unsigned char *pbuf;
     int n;
 
 

simulators/simft990.c

@@ -145,8 +145,6 @@ int openPort(char *comport) // doesn't matter for using pts devices
 int main(int argc, char *argv[])
 {
     char buf[256];
-    char *pbuf;
-    int n;
     int fd = openPort(argv[1]);
 
     load_dat("simft990.dat", alldata);

simulators/simic7200.c

@@ -71,7 +71,7 @@ void dumphex(unsigned char *buf, int n)
 int
 frameGet(int fd, unsigned char *buf)
 {
-    int i = 0, n;
+    int i = 0;
     memset(buf, 0, BUFSIZE);
     unsigned char c;
 

simulators/simjupiter.c

@@ -88,9 +88,6 @@ int openPort(char *comport) // doesn't matter for using pts devices
 int main(int argc, char *argv[])
 {
     unsigned char buf[256];
-    unsigned char *pbuf;
-    int n;
-
 
 again:
     int fd = openPort(argv[1]);

src/cm108.c

@@ -295,8 +295,6 @@ int cm108_ptt_get(hamlib_port_t *p, ptt_t *pttx)
  */
 int cm108_dcd_get(hamlib_port_t *p, dcd_t *dcdx)
 {
-    int bytes;
-
     rig_debug(RIG_DEBUG_VERBOSE, "%s called\n", __func__);
 
     return RIG_OK;