staging: rtl8192e: Remove is_mesh from rtllib_softmac_scan_syncro

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

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/9fcd1193c155ef992493af3526442fb84032166f.1690615475.git.philipp.g.hortmann@gmail.com


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