replay: Remove unused replay_disable_events

replay_disable_events has been unused since 2019's
  c8aa7895eb ("replay: don't drain/flush bdrv queue while RR is working")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <dave@treblig.org>
Reviewed-by: Pavel Dovgalyuk <pavel.dovgalyuk@ispras.ru>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

include/sysemu/replay.h

@@ -117,8 +117,6 @@ void replay_async_events(void);
 
 /* Asynchronous events queue */
 
-/*! Disables storing events in the queue */
-void replay_disable_events(void);
 /*! Enables storing events in the queue */
 void replay_enable_events(void);
 /*! Returns true when saving events is enabled */

replay/replay-events.c

@@ -92,15 +92,6 @@ void replay_flush_events(void)
     }
 }
 
-void replay_disable_events(void)
-{
-    if (replay_mode != REPLAY_MODE_NONE) {
-        events_enabled = false;
-        /* Flush events queue before waiting of completion */
-        replay_flush_events();
-    }
-}
-
 /*! Adds specified async event to the queue */
 void replay_add_event(ReplayAsyncEventKind event_kind,
                       void *opaque,