aio / timers: Remove alarm timers

Remove alarm timers from qemu-timers.c now we use g_poll / ppoll
instead.

Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

include/qemu/timer.h

@@ -635,9 +635,6 @@ bool qemu_run_timers(QEMUClock *clock);
  */
 bool qemu_run_all_timers(void);
 
-void configure_alarms(char const *opt);
-int init_timer_alarm(void);
-
 /**
  * initclocks:
  *

main-loop.c

@@ -131,10 +131,6 @@ int qemu_init_main_loop(void)
     GSource *src;
 
     init_clocks();
-    if (init_timer_alarm() < 0) {
-        fprintf(stderr, "could not initialize alarm timer\n");
-        exit(1);
-    }
 
     ret = qemu_signal_init();
     if (ret) {

vl.c

@@ -3714,7 +3714,9 @@ int main(int argc, char **argv, char **envp)
                 old_param = 1;
                 break;
             case QEMU_OPTION_clock:
-                configure_alarms(optarg);
+                /* Clock options no longer exist.  Keep this option for
+                 * backward compatibility.
+                 */
                 break;
             case QEMU_OPTION_startdate:
                 configure_rtc_date_offset(optarg, 1);