staging: rtl8192e: Remove unused macro RT_SET_PS_LEVEL

Remove unused macro RT_SET_PS_LEVEL to shorten code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/0d397210830f77ad3231c3b4a0465ae89aacb962.1681627603.git.philipp.g.hortmann@gmail.com


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