diff --git a/kitty/boss.py b/kitty/boss.py
index 86a28e801..c162d7b7e 100644
--- a/kitty/boss.py
+++ b/kitty/boss.py
@@ -88,7 +88,6 @@ class Boss(Thread):
         self.read_dispatch_map = {
             self.signal_fd: self.signal_received,
             self.read_wakeup_fd: self.on_wakeup}
-        self.all_writers = []
         self.timers = Timers()
         self.ui_timers = Timers()
         self.pending_ui_thread_calls = Queue()
@@ -163,10 +162,6 @@ class Boss(Thread):
     def remove_child_fd(self, child_fd):
         self.read_dispatch_map.pop(child_fd, None)
         self.write_dispatch_map.pop(child_fd, None)
-        try:
-            self.all_writers.remove(child_fd)
-        except Exception:
-            pass
 
     def queue_ui_action(self, func, *args):
         self.pending_ui_thread_calls.put((func, args))
diff --git a/kitty/timers.py b/kitty/timers.py
index e4f3d5482..aaeb56d4a 100644
--- a/kitty/timers.py
+++ b/kitty/timers.py
@@ -51,8 +51,8 @@ class Timers:
                 (expired_timers if ev[0] <= now else waiting_timers).append(ev)
             self.timers = waiting_timers
             for ev in expired_timers:
-                    try:
-                        ev.callback(*ev.args)
-                    except Exception:
-                        import traceback
-                        safe_print(traceback.format_exc())
+                try:
+                    ev.callback(*ev.args)
+                except Exception:
+                    import traceback
+                    safe_print(traceback.format_exc())