Avoid extra function call when waking up for cursor blink rendering

kitty/boss.py

@@ -60,10 +60,6 @@ class Timers(_Timers):
         return _Timers.remove_event(self, timer)
 
 
-def wakeup_for_cursor_blink_render():
-    pass
-
-
 class DumpCommands:  # {{{
 
     def __init__(self, args):
@@ -408,7 +404,7 @@ class Boss:
                         n = t // d
                         draw_cursor = n % 2 == 0
                         self.ui_timers.add_if_before(
-                            ((n + 1) * d / 1000) - now, wakeup_for_cursor_blink_render)
+                            ((n + 1) * d / 1000) - now, None)
                     if draw_cursor:
                         with self.cursor_program:
                             active.char_grid.render_cursor(