staging: rtl8192e: Remove unused variable bInPowerSaveMode

bInPowerSaveMode is just once initialized and changed but never evaluated.
Remove resulting dead code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/be3ebecd88b85ba1d87b9b3fbe02f2e78e6a669e.1664616227.git.philipp.g.hortmann@gmail.com


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