staging: rtl8192e: Remove undefined function UpdateBeaconInterruptHandler

Remove function UpdateBeaconInterruptHandler as it is not defined.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/7cc71096fb1e6fee755dd96de0095ef1fb6d51e1.1683960685.git.philipp.g.hortmann@gmail.com


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