Revert "Allow user-defined QOS class names"

This reverts commit a6a7de2f8c6061eb94fa534aae47af3b8890b33f.

Conflicts:
	release/src/router/httpd/tomato.c
	release/src/router/nvram/defaults.c
	release/src/router/www/qos-classify.asp
	release/src/router/www/qos-graph.svg
	release/src/router/www/qos-graphs.asp
	release/src/router/www/qos-settings.asp