staging: rtl8192e: Remove variables Wakeup, Reserved0 and AGC

Remove unused variables Wakeup, Reserved0 and AGC.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/ed88686c1e9213dac1cc8f698f7dea8cb5fa01f9.1708461563.git.philipp.g.hortmann@gmail.com


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