USB: delete CONFIG_USB_DEVICEFS from defconfig

It no longer occurs in Kconfig.
USB: remove CONFIG_USB_DEVICEFS(fb28d58b

) leaked remove defconfig.

Signed-off-by: Naoki MATSUMOTO <nekomatu+linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>