Remove #ifs for older versions of wx

aegisub/src/aegisublocale.cpp

@@ -106,11 +106,7 @@ wxString AegisubLocale::PickLanguage() {
 		style |= wxCANCEL;
 
 	wxSingleChoiceDialog dialog(nullptr, "Please choose a language:", "Language", langNames,
-#if wxCHECK_VERSION(2, 9, 4)
 			(void **)nullptr,
-#else
-			0,
-#endif
 			style);
 	if (dialog.ShowModal() == wxID_OK) {
 		int picked = dialog.GetSelection();

aegisub/src/menu.cpp

@@ -457,22 +457,6 @@ namespace menu {
 		window->Bind(wxEVT_COMMAND_MENU_SELECTED, &CommandManager::OnMenuClick, &menu->cm);
 		window->SetMenuBar(menu.get());
 
-#if defined(__WXGTK__) && !wxCHECK_VERSION(2, 9, 5)
-		// Older versions of wxGTK silently swallow keypresses for accelerators
-		// whose associated menu items are disabled. As we don't update the
-		// menu until it's opened, this means that conditional hotkeys don't
-		// work if the menu hasn't been opened since they became valid.
-		//
-		// To work around this, we completely disable accelerators from menu
-		// item. wxGTK doesn't expose any way to do this other that at wx
-		// compile time (SetAcceleratorTable is a no-op), so have some fun with
-		// the implementation details of undocumented methods. Detaching via
-		// wxMenuBar::Detach removes the accelerator table, and then
-		// wxMenuBarBase::Attch is used to avoid readding it.
-		menu->Detach();
-		menu->wxMenuBarBase::Attach(window);
-#endif
-
 		menu.release();
 	}
 

aegisub/src/preferences.cpp

@@ -370,11 +370,7 @@ public:
 };
 
 static void edit_item(wxDataViewCtrl *dvc, wxDataViewItem item) {
-#if wxCHECK_VERSION(2, 9, 4)
 	dvc->EditItem(item, dvc->GetColumn(0));
-#else
-	dvc->StartEditor(item, 0);
-#endif
 }
 
 /// Interface Hotkeys preferences subpage