staging: rtl8192e: Remove empty struct rtl819x_ops

Remove empty struct rtl819x_ops as it is dead code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/31b5b0ba88d7b07b0407956d56446e8f0e62e3e7.1677133271.git.philipp.g.hortmann@gmail.com


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