nostrdb: Revert "mem: search cursor close"

this is causing heap corruption on the windows
build

This reverts commit a8d6925a5b33ddbdd4306423527b5d8314f7dd36.

nostrdb/src/nostrdb.c

@@ -3083,7 +3083,6 @@ int ndb_search_profile(struct ndb_txn *txn, struct ndb_search *search, const cha
 		search->key = k.mv_data;
 		assert(v.mv_size == 8);
 		search->profile_key = *((uint64_t*)v.mv_data);
-		mdb_cursor_close(search->cursor);
 		return 1;
 	}