rtl8192u: delete another embedded instance of generic reason codes

We have global copies of all these reason codes.  We don't need local
copies.  Worse is that these seem totally unused; a grep for some of
the fields comes up empty, and it still compiles after its complete
removal.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>