qcacld-3.0: Remove sme_set_prefer_80MHz_over_160MHz() prototype

Support for 80 MHz preference was relocated to the MLME
component. Change Ia5989a29378bf33e3c9550a0ae26338aeb966592
("qcacld-3.0: Apply mlme sta configuraions") removed the now
obsolete implementation of sme_set_prefer_80MHz_over_160MHz(),
but failed to remove the prototype, so remove it now.

Change-Id: Id32a1feb5ac55492ae0b76d4dc75867bbe834b4a
CRs-Fixed: 2378328

core/sme/inc/sme_api.h

@@ -1689,8 +1689,7 @@ QDF_STATUS sme_fips_request(mac_handle_t mac_handle, struct fips_params *param,
  * Return: QDF_STATUS
  */
 QDF_STATUS sme_set_cts2self_for_p2p_go(mac_handle_t mac_handle);
-void sme_set_prefer_80MHz_over_160MHz(mac_handle_t mac_handle,
-		bool sta_prefer_80MHz_over_160MHz);
+
 QDF_STATUS sme_update_tx_fail_cnt_threshold(mac_handle_t mac_handle,
 		uint8_t session_id, uint32_t tx_fail_count);