remove unused preprocessor value
remove unused preprocessor value

BWallet/sx,tuomassiren/libbitcoin-explorer,BWallet/sx,GroestlCoin/libgroestlcoin-explorer,kaostao/sx,tuomassiren/libbitcoin-explorer,cancoin/libbitcoin-explorer,libmetrocoin/libmetrocoin-explorer,kaostao/sx,BWallet/sx,kaostao/sx,libmetrocoin/libmetrocoin-explorer,GroestlCoin/libgroestlcoin-explorer,libtetcoin/libtetcoin-explorer,GroestlCoin/libgroestlcoin-explorer,libtetcoin/libtetcoin-explorer,cancoin/libbitcoin-explorer