kconfig: qconf: remove unused colNr

This is not used at all.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/kconfig/qconf.h

@@ -30,7 +30,7 @@ class ConfigSettings : public QSettings {
 };
 
 enum colIdx {
-	promptColIdx, nameColIdx, noColIdx, modColIdx, yesColIdx, dataColIdx, colNr
+	promptColIdx, nameColIdx, noColIdx, modColIdx, yesColIdx, dataColIdx
 };
 enum listMode {
 	singleMode, menuMode, symbolMode, fullMode, listMode