testusb: remove all mentions of 'usbfs'

Commit 8a424bf40d772fedacc91862ecc86f10541fabb3 (tools/usb: remove last USBFS
user) removed 'usbfs' files from the source but retained mentions of 'usbfs'
all over the place, most importantly in the misleading error messages printed
in case USB device files are not there.  Remove all the  mentions of 'usbfs'
for good now!

Signed-off-by: Sergei Shtylyov <sshtylyov@dev.rtsoft.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed