[meld/deprecation-cleanup: 18/48] filediff: Remove reference to long-gone selector_hbox widget list

[Kai Willadsen <kaiw src gnome org>]

commit 591778a063afb11ce3a6e90fd813e2cfcdd4e259
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sat Dec 1 07:03:29 2018 +1000

    filediff: Remove reference to long-gone selector_hbox widget list

 meld/filediff.py | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)
---
diff --git a/meld/filediff.py b/meld/filediff.py
index 6a058daa..0a61f2a2 100644
--- a/meld/filediff.py
+++ b/meld/filediff.py
@@ -138,19 +138,12 @@ class FileDiff(MeldDoc, Component):
         widget_lists = [
             "diffmap", "file_save_button", "file_toolbar", "fileentry",
             "linkmap", "msgarea_mgr", "readonlytoggle",
-            "scrolledwindow", "selector_hbox", "textview", "vbox",
+            "scrolledwindow", "textview", "vbox",
             "dummy_toolbar_linkmap", "filelabel_toolitem", "filelabel",
             "fileentry_toolitem", "dummy_toolbar_diffmap", "statusbar",
         ]
         self.map_widgets_into_lists(widget_lists)
 
-        # This SizeGroup isn't actually necessary for FileDiff; it's for
-        # handling non-homogenous selectors in FileComp. It's also fragile.
-        column_sizes = Gtk.SizeGroup(mode=Gtk.SizeGroupMode.HORIZONTAL)
-        column_sizes.set_ignore_hidden(True)
-        for widget in self.selector_hbox:
-            column_sizes.add_widget(widget)
-
         self.warned_bad_comparison = False
         self._keymask = 0
         self.meta = {}