qcacld-3.0: Remove ampdu_size from struct sap_config

Change I9d05cd7b8e051c4e9e4912cf866206ae32ec293d ("qcacld-3.0: Define
data structures for new AP requirements") added the ampdu_size field
to struct sap_config. However logic to use this field was never added,
so remove the field since it is unused.

Change-Id: I183766da3af3a3e9c609ccde95a0cca561813226
CRs-Fixed: 2380767

core/sap/inc/sap_api.h

@@ -558,7 +558,6 @@ typedef struct sap_config {
 	uint16_t tx_pkt_fail_cnt_threshold;
 	uint8_t short_retry_limit;
 	uint8_t long_retry_limit;
-	uint8_t ampdu_size;
 	tSirMacRateSet supported_rates;
 	tSirMacRateSet extended_rates;
 	enum sap_acs_dfs_mode acs_dfs_mode;