kconfig: qconf: remove "goBack" debug message

Every time the goback icon is clicked, the annoying message "goBack"
is displayed on the console.

I guess this line is the left-over debug code of commit af737b4d
("kconfig: qconf: simplify the goBack() logic").
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/kconfig/qconf.cc

@@ -1734,7 +1734,6 @@ void ConfigMainWindow::listFocusChanged(void)
 
 void ConfigMainWindow::goBack(void)
 {
-qInfo() << __FUNCTION__;
 	if (configList->rootEntry == &rootmenu)
 		return;