USB: doc: usb-help.txt update.

 http://www.suse.cz/development/linux-usb/ doesn't exist anymore.
Signed-off-by: NLuiz Fernando N. Capitulino <lcapitulino@mandriva.com.br>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Documentation/usb/usb-help.txt

@@ -5,8 +5,7 @@ For USB help other than the readme files that are located in
 Documentation/usb/*, see the following:
 
 Linux-USB project:  http://www.linux-usb.org
-  mirrors at        http://www.suse.cz/development/linux-usb/
-         and        http://usb.in.tum.de/linux-usb/
+  mirrors at        http://usb.in.tum.de/linux-usb/
          and        http://it.linux-usb.org
 Linux USB Guide:    http://linux-usb.sourceforge.net
 Linux-USB device overview (working devices and drivers):