qcacld-3.0: Remove tSirSmeDisassoc* perStaStats field

Both tSirSmeDisassocRsp and tSirSmeDisassocInd contain a perStaStats
field that isn't used, so remove it from both structs.

Note that these perStaStats fields were the only places that
tAniStaStatStruct was used, so remove that as well.

Change-Id: Id38087da738a2ee8bb16d4dff297420231476986
CRs-Fixed: 2363218

core/mac/inc/sir_api.h

@@ -1462,7 +1462,6 @@ typedef struct sSirSmeDisassocRsp {
 	uint16_t transactionId; /* Transaction ID for cmd */
 	tSirResultCodes statusCode;
 	struct qdf_mac_addr peer_macaddr;
-	tAniStaStatStruct perStaStats;  /* STA stats */
 	uint16_t staId;
 } tSirSmeDisassocRsp, *tpSirSmeDisassocRsp;
 
@@ -1475,7 +1474,6 @@ typedef struct sSirSmeDisassocInd {
 	tSirResultCodes statusCode;
 	struct qdf_mac_addr bssid;
 	struct qdf_mac_addr peer_macaddr;
-	tAniStaStatStruct perStaStats;  /* STA stats */
 	uint16_t staId;
 	uint32_t reasonCode;
 } tSirSmeDisassocInd, *tpSirSmeDisassocInd;