Staging: w35und: Kill wblinux_f.h header

The wblinux_f.h header file doesn't contain anything that's actually used. Kill
it.

Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>