transaction: remove unused mmap-related code
transaction: remove unused mmap-related code

molecular/electrum,spesmilo/electrum,dabura667/electrum,wakiyamap/electrum-mona,vertcoin/electrum-vtc,lbryio/lbryum,cryptapus/electrum-uno,digitalbitbox/electrum,dashpay/electrum-dash,romanz/electrum,digitalbitbox/electrum,protonn/Electrum-Cash,cryptapus/electrum,molecular/electrum,digitalbitbox/electrum,protonn/Electrum-Cash,procrasti/electrum,pknight007/electrum-vtc,vertcoin/electrum-vtc,protonn/Electrum-Cash,fyookball/electrum,wakiyamap/electrum-mona,fireduck64/electrum,cryptapus/electrum-myr,argentumproject/electrum-arg,romanz/electrum,cryptapus/electrum-myr,aasiutin/electrum,wakiyamap/electrum-mona,fujicoin/electrum-fjc,fujicoin/electrum-fjc,argentumproject/electrum-arg,vertcoin/electrum-vtc,procrasti/electrum,imrehg/electrum,pooler/electrum-ltc,lbryio/lbryum,spesmilo/electrum,kyuupichan/electrum,vialectrum/vialectrum,argentumproject/electrum-arg,pooler/electrum-ltc,FairCoinTeam/electrum-fair,fyookball/electrum,dabura667/electrum,dashpay/electrum-dash,kyuupichan/electrum,imrehg/electrum,fujicoin/electrum-fjc,FairCoinTeam/electrum-fair,dashpay/electrum-dash,argentumproject/electrum-arg,pknight007/electrum-vtc,aasiutin/electrum,digitalbitbox/electrum,pooler/electrum-ltc,pknight007/electrum-vtc,asfin/electrum,cryptapus/electrum-uno,cryptapus/electrum-myr,aasiutin/electrum,pooler/electrum-ltc,cryptapus/electrum,spesmilo/electrum,asfin/electrum,vertcoin/electrum-vtc,imrehg/electrum,cryptapus/electrum-uno,FairCoinTeam/electrum-fair,pknight007/electrum-vtc,wakiyamap/electrum-mona,neocogent/electrum,molecular/electrum,cryptapus/electrum,fireduck64/electrum,vialectrum/vialectrum,protonn/Electrum-Cash,spesmilo/electrum,cryptapus/electrum-myr,fyookball/electrum,dabura667/electrum,fireduck64/electrum,procrasti/electrum,cryptapus/electrum-uno,procrasti/electrum,imrehg/electrum,neocogent/electrum,dabura667/electrum,fireduck64/electrum,FairCoinTeam/electrum-fair,aasiutin/electrum,neocogent/electrum,romanz/electrum,asfin/electrum,molecular/electrum,kyuupichan/electrum,dashpay/electrum-dash,vialectrum/vialectrum