Revert "samples: mss: Fix Wi-Fi scan"

This reverts commit 82cfff1.

Issue is fixed as part of Wi-Fi FW, and this commit has a typo that
causes build failures.

Signed-off-by: Chaitanya Tata <[email protected]>

Author: krish2718

samples/cellular/nrf_cloud_multi_service/overlay-nrf7002ek-wifi-scan-only.conf

@@ -50,7 +50,3 @@ CONFIG_NET_MAX_CONTEXTS=5
 
 # Disable LED patterns, enabling WiFi scanning takes control of two LEDs
 CONFIG_LED_INDICATION_DISABLED=y
-
-# Temporary tweak: Disable wifi_mgmt buffer offload; It causes scans to fail in scan-only mode.
-# To be removed when SHEL-3213 is resolved
-DCONFIG_NRF_WIFI_MGMT_BUFF_OFFLOAD=n