wifi: wcn36xx: Remove unused wcn36xx_smd_update_scan_params

wifi: wcn36xx: Remove unused wcn36xx_smd_update_scan_params

wcn36xx_smd_update_scan_params() last use was removed in 2020 by
commit 5973a2947430 ("wcn36xx: Fix software-driven scan")

Remove it.

This leaves the wcn36xx_hal_update_scan_params_req_ex and
wcn36xx_hal_update_scan_params_resp structs unused.

Remove them, together with the unused
wcn36xx_hal_update_scan_params_req.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Acked-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
Link: https://patch.msgid.link/20251011001038.352393-1-linux@treblig.org
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>