Revert "Add CM108 and GPIO DCD types to rigctld.c"

This reverts commit 89d4bf3a6a.

tests/rigctld.c

@@ -398,18 +398,6 @@ int main(int argc, char *argv[])
             {
                 dcd_type = RIG_DCD_PARALLEL;
             }
-            else if (!strcmp(optarg, "CM108"))
-            {
-                dcd_type = RIG_DCD_CM108;
-            }
-            else if (!strcmp(optarg, "GPIO"))
-            {
-                dcd_type = RIG_DCD_GPIO;
-            }
-            else if (!strcmp(optarg, "GPION"))
-            {
-                dcd_type = RIG_DCD_GPION;
-            }
             else if (!strcmp(optarg, "NONE"))
             {
                 dcd_type = RIG_DCD_NONE;