staging: rtl8192e: Remove unused variables rxrdu and rxok

rxrdu and rxok are initialized and increased but never read. Remove dead
code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/20738d339066e36f5347c7e5011bd3d1aa3e4f53.1674675808.git.philipp.g.hortmann@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>