qmp: Eliminate silly QERR_COMMAND_NOT_FOUND macro

The QERR_ macros are leftovers from the days of "rich" error objects.
They're used with error_set() and qerror_report(), and expand into the
first *two* arguments.  This trickiness has become pointless.  Clean
this one up.
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

include/qapi/qmp/qerror.h

@@ -52,9 +52,6 @@ void qerror_report_err(Error *err);
 #define QERR_BUS_NOT_FOUND \
     ERROR_CLASS_GENERIC_ERROR, "Bus '%s' not found"
 
-#define QERR_COMMAND_NOT_FOUND \
-    ERROR_CLASS_COMMAND_NOT_FOUND, "The command %s has not been found"
-
 #define QERR_DEVICE_ENCRYPTED \
     ERROR_CLASS_DEVICE_ENCRYPTED, "'%s' (%s) is encrypted"
 

monitor.c

@@ -5081,7 +5081,8 @@ static void handle_qmp_command(JSONMessageParser *parser, QList *tokens)
     trace_handle_qmp_command(mon, cmd_name);
     cmd = qmp_find_cmd(cmd_name);
     if (!cmd || invalid_qmp_mode(mon, cmd)) {
-        qerror_report(QERR_COMMAND_NOT_FOUND, cmd_name);
+        qerror_report(ERROR_CLASS_COMMAND_NOT_FOUND,
+                      "The command %s has not been found", cmd_name);
         goto err_out;
     }
 

qapi/qmp-dispatch.c

@@ -76,7 +76,8 @@ static QObject *do_qmp_dispatch(QObject *request, Error **errp)
     command = qdict_get_str(dict, "execute");
     cmd = qmp_find_command(command);
     if (cmd == NULL) {
-        error_set(errp, QERR_COMMAND_NOT_FOUND, command);
+        error_set(errp, ERROR_CLASS_COMMAND_NOT_FOUND,
+                  "The command %s has not been found", command);
         return NULL;
     }
     if (!cmd->enabled) {