staging: rtl8192e: Remove functions rtllib_start_hw_scan and stop

Remove functions rtllib_start_hw_scan and rtllib_stop_hw_scan as they are
not defined.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/868524470321b8936f63d3ea06ba86c34fc89bb7.1683960684.git.philipp.g.hortmann@gmail.com


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