staging: rtl8192e: Remove unused timer SetupTimer

Remove unused timer SetupTimer and all the resulting unused code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/4bbbd60d84e15fdb7bffde98a687ed168a4dfbbd.1687583718.git.philipp.g.hortmann@gmail.com


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