Only call free once in CHOICE type.

crypto/asn1/tasn_fre.c

@@ -115,8 +115,6 @@ static void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it, int c
 				return;
 			}
 		i = asn1_get_choice_selector(pval, it);
-		if (asn1_cb)
-			asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL);
 		if ((i >= 0) && (i < it->tcount))
 			{
 			ASN1_VALUE **pchval;