qcacmn: Remove an obsolete lock in host to target layer

After gerrit#2176826, which the change ID is
I615f0e4d6de150924b99b3444cebf00571ddc088, HTCCreditLock is
removed from creation. However, the destroy of this lock is
missed. Need to remove this obsolete lock completely.

CRs-Fixed: 2345978
Change-Id: I4b67aa2a12befcd94a04a8a6acd43e31ae0b837f

htc/htc.c

@@ -192,7 +192,6 @@ static void htc_cleanup(HTC_TARGET *target)
 	qdf_spinlock_destroy(&target->HTCLock);
 	qdf_spinlock_destroy(&target->HTCRxLock);
 	qdf_spinlock_destroy(&target->HTCTxLock);
-	qdf_spinlock_destroy(&target->HTCCreditLock);
 	for (i = 0; i < ENDPOINT_MAX; i++) {
 		endpoint = &target->endpoint[i];
 		qdf_spinlock_destroy(&endpoint->lookup_queue_lock);

htc/htc_internal.h

@@ -190,7 +190,6 @@ typedef struct _HTC_TARGET {
 	qdf_spinlock_t HTCLock;
 	qdf_spinlock_t HTCRxLock;
 	qdf_spinlock_t HTCTxLock;
-	qdf_spinlock_t HTCCreditLock;
 	uint32_t HTCStateFlags;
 	void *host_handle;
 	struct htc_init_info HTCInitInfo;