staging: rtl8192e: Remove is_mesh from rtllib_start_scan_syncro

Function rtllib_start_scan_syncro() has parameter is_mesh which is in all
calls 0. Remove dead code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/6050a1d7764364190dda252f79d75c7cc47143de.1690615475.git.philipp.g.hortmann@gmail.com


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