Monitor: Drop monitor_cmd_user_only()

This function was only needed when QMP and HMP were sharing dispatch
tables, this is no longer true so just drop it.
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>

monitor.c

@@ -340,11 +340,6 @@ static inline bool monitor_handler_is_async(const mon_cmd_t *cmd)
     return cmd->flags & MONITOR_CMD_ASYNC;
 }
 
-static inline bool monitor_cmd_user_only(const mon_cmd_t *cmd)
-{
-    return (cmd->flags & MONITOR_CMD_USER_ONLY);
-}
-
 static inline int monitor_has_error(const Monitor *mon)
 {
     return mon->error != NULL;

monitor.h

@@ -18,7 +18,6 @@ extern Monitor *default_mon;
 
 /* flags for monitor commands */
 #define MONITOR_CMD_ASYNC       0x0001
-#define MONITOR_CMD_USER_ONLY   0x0002
 
 /* QMP events */
 typedef enum MonitorEvent {