kconfig: qconf: remove unused ConfigItem::okRename()

Commit 76538660 ("Port xconfig to Qt5 - Remove custom
ListView classes.") removed the original implementation, where
ConfigItem::okRename() overrode Q3ListViewItem::okRename().

Commit 59e56440 ("Port xconfig to Qt5 - Put back some of the
old implementation.") restored the empty stub, but it seems
useless.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/kconfig/qconf.cc

@@ -82,14 +82,6 @@ QIcon ConfigItem::choiceNoIcon;
 QIcon ConfigItem::menuIcon;
 QIcon ConfigItem::menubackIcon;
 
-/*
- * set the new data
- * TODO check the value
- */
-void ConfigItem::okRename(int col)
-{
-}
-
 /*
  * update the displayed of a menu entry
  */

scripts/kconfig/qconf.h

@@ -131,7 +131,6 @@ class ConfigItem : public QTreeWidgetItem {
 	}
 	~ConfigItem(void);
 	void init(void);
-	void okRename(int col);
 	void updateMenu(void);
 	void testUpdateMenu(bool v);
 	ConfigList* listView() const