Remove unused slot

kitty/layout.py

@@ -162,7 +162,6 @@ class Layout:  # {{{
     name = None
     needs_window_borders = True
     only_active_window_visible = False
-    layout_data_class = None
 
     def __init__(self, os_window_id, tab_id, margin_width, single_window_margin_width, padding_width, border_width, layout_opts=''):
         self.os_window_id = os_window_id
@@ -406,10 +405,6 @@ class Layout:  # {{{
         self.blank_rects.append(Rect(window.geometry.left, window.geometry.bottom, window.geometry.right, central.bottom + 1))
     # }}}
 
-    def layout_data_for_window(self, w):
-        if self.layout_data_class is not None and isinstance(w.layout_data, self.layout_data_class):
-            return w.layout_data
-
     def do_layout(self, windows, active_window_idx):
         raise NotImplementedError()
 

kitty/window.py

@@ -135,7 +135,6 @@ class Window:
 
     def __init__(self, tab, child, opts, args, override_title=None, copy_colors_from=None):
         self.action_on_close = self.action_on_removal = None
-        self.layout_data = None
         self.current_marker_spec = None
         self.pty_resized_once = False
         self.needs_attention = False