staging: rtl8192e: Remove unused variable is_mesh from rtllib_send_probe

Function rtllib_send_probe() has unused parameter is_mesh. Remove dead
code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/5b1f4b9d8f81790c151adc7f9b6611f0b5cd94a5.1690615475.git.philipp.g.hortmann@gmail.com


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