compositor: remove incorrect idle timer initialization

weston_compositor_create() should just create idle timer but not arm it,
because idle-time setting is not ready at this point.

Remove idle timer first update in weston_compositor_create() since
idle_time variable is not set at this point. Idle timer is armed
properly later in weston_compositor_wake().

Signed-off-by: Egor Starkov <egor.starkov@ge.com>
[Pekka: tweaked commit message]
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

src/compositor.c

@@ -4527,7 +4527,6 @@ weston_compositor_create(struct wl_display *display, void *user_data)
 
 	loop = wl_display_get_event_loop(ec->wl_display);
 	ec->idle_source = wl_event_loop_add_timer(loop, idle_handler, ec);
-	wl_event_source_timer_update(ec->idle_source, ec->idle_time * 1000);
 
 	ec->input_loop = wl_event_loop_create();