test: remove unused helpers random_transaction(), make_change() and gather_inputs()
test: remove unused helpers random_transaction(), make_change() and gather_inputs()

rnicoll/bitcoin,litecoin-project/litecoin,domob1812/namecore,dscotese/bitcoin,alecalve/bitcoin,pstratem/bitcoin,MarcoFalke/bitcoin,mm-s/bitcoin,pataquets/namecoin-core,fujicoin/fujicoin,Sjors/bitcoin,pataquets/namecoin-core,achow101/bitcoin,cdecker/bitcoin,jambolo/bitcoin,alecalve/bitcoin,domob1812/bitcoin,jonasschnelli/bitcoin,instagibbs/bitcoin,kallewoof/bitcoin,ElementsProject/elements,litecoin-project/litecoin,JeremyRubin/bitcoin,bitcoinsSG/bitcoin,qtumproject/qtum,jnewbery/bitcoin,EthanHeilman/bitcoin,AkioNak/bitcoin,jlopp/statoshi,rnicoll/bitcoin,bitcoinsSG/bitcoin,MeshCollider/bitcoin,cdecker/bitcoin,jonasschnelli/bitcoin,anditto/bitcoin,pataquets/namecoin-core,Xekyo/bitcoin,GroestlCoin/GroestlCoin,prusnak/bitcoin,kallewoof/bitcoin,lateminer/bitcoin,n1bor/bitcoin,sstone/bitcoin,GroestlCoin/GroestlCoin,kallewoof/bitcoin,Sjors/bitcoin,anditto/bitcoin,apoelstra/bitcoin,EthanHeilman/bitcoin,domob1812/namecore,yenliangl/bitcoin,namecoin/namecore,anditto/bitcoin,fanquake/bitcoin,instagibbs/bitcoin,particl/particl-core,bitcoinknots/bitcoin,JeremyRubin/bitcoin,GroestlCoin/bitcoin,domob1812/namecore,apoelstra/bitcoin,instagibbs/bitcoin,lateminer/bitcoin,tecnovert/particl-core,achow101/bitcoin,practicalswift/bitcoin,sstone/bitcoin,ajtowns/bitcoin,namecoin/namecoin-core,jlopp/statoshi,n1bor/bitcoin,qtumproject/qtum,tecnovert/particl-core,n1bor/bitcoin,jamesob/bitcoin,instagibbs/bitcoin,namecoin/namecore,jamesob/bitcoin,Xekyo/bitcoin,litecoin-project/litecoin,bitcoinsSG/bitcoin,anditto/bitcoin,alecalve/bitcoin,practicalswift/bitcoin,ajtowns/bitcoin,rnicoll/bitcoin,yenliangl/bitcoin,particl/particl-core,fanquake/bitcoin,sipsorcery/bitcoin,jamesob/bitcoin,sstone/bitcoin,lateminer/bitcoin,domob1812/bitcoin,cdecker/bitcoin,domob1812/namecore,jnewbery/bitcoin,namecoin/namecore,MarcoFalke/bitcoin,MeshCollider/bitcoin,namecoin/namecoin-core,mruddy/bitcoin,pstratem/bitcoin,cdecker/bitcoin,jlopp/statoshi,pataquets/namecoin-core,JeremyRubin/bitcoin,rnicoll/dogecoin,jamesob/bitcoin,alecalve/bitcoin,AkioNak/bitcoin,qtumproject/qtum,sipsorcery/bitcoin,ajtowns/bitcoin,achow101/bitcoin,particl/particl-core,n1bor/bitcoin,fanquake/bitcoin,lateminer/bitcoin,EthanHeilman/bitcoin,namecoin/namecoin-core,andreaskern/bitcoin,MeshCollider/bitcoin,Sjors/bitcoin,particl/particl-core,bitcoinknots/bitcoin,kallewoof/bitcoin,fujicoin/fujicoin,pstratem/bitcoin,andreaskern/bitcoin,jnewbery/bitcoin,GroestlCoin/GroestlCoin,Sjors/bitcoin,practicalswift/bitcoin,prusnak/bitcoin,yenliangl/bitcoin,cdecker/bitcoin,cdecker/bitcoin,jnewbery/bitcoin,bitcoin/bitcoin,anditto/bitcoin,jnewbery/bitcoin,practicalswift/bitcoin,pataquets/namecoin-core,MarcoFalke/bitcoin,apoelstra/bitcoin,jonasschnelli/bitcoin,qtumproject/qtum,litecoin-project/litecoin,kallewoof/bitcoin,namecoin/namecore,jambolo/bitcoin,jlopp/statoshi,mm-s/bitcoin,litecoin-project/litecoin,AkioNak/bitcoin,fanquake/bitcoin,bitcoin/bitcoin,ajtowns/bitcoin,tecnovert/particl-core,namecoin/namecore,bitcoinsSG/bitcoin,andreaskern/bitcoin,bitcoin/bitcoin,jamesob/bitcoin,jlopp/statoshi,sipsorcery/bitcoin,practicalswift/bitcoin,sipsorcery/bitcoin,ElementsProject/elements,tecnovert/particl-core,namecoin/namecore,namecoin/namecoin-core,MeshCollider/bitcoin,jambolo/bitcoin,namecoin/namecoin-core,jambolo/bitcoin,sipsorcery/bitcoin,MarcoFalke/bitcoin,pstratem/bitcoin,namecoin/namecoin-core,instagibbs/bitcoin,achow101/bitcoin,pstratem/bitcoin,jlopp/statoshi,achow101/bitcoin,Xekyo/bitcoin,jonasschnelli/bitcoin,MarcoFalke/bitcoin,prusnak/bitcoin,bitcoinknots/bitcoin,GroestlCoin/bitcoin,GroestlCoin/bitcoin,GroestlCoin/bitcoin,prusnak/bitcoin,Sjors/bitcoin,alecalve/bitcoin,instagibbs/bitcoin,EthanHeilman/bitcoin,prusnak/bitcoin,qtumproject/qtum,sipsorcery/bitcoin,dscotese/bitcoin,apoelstra/bitcoin,jonasschnelli/bitcoin,sstone/bitcoin,fujicoin/fujicoin,prusnak/bitcoin,bitcoinknots/bitcoin,JeremyRubin/bitcoin,jambolo/bitcoin,apoelstra/bitcoin,AkioNak/bitcoin,MarcoFalke/bitcoin,EthanHeilman/bitcoin,JeremyRubin/bitcoin,lateminer/bitcoin,apoelstra/bitcoin,GroestlCoin/GroestlCoin,MeshCollider/bitcoin,ElementsProject/elements,Xekyo/bitcoin,pstratem/bitcoin,bitcoinknots/bitcoin,litecoin-project/litecoin,AkioNak/bitcoin,particl/particl-core,dscotese/bitcoin,tecnovert/particl-core,andreaskern/bitcoin,domob1812/namecore,sstone/bitcoin,domob1812/namecore,dscotese/bitcoin,bitcoin/bitcoin,dscotese/bitcoin,bitcoin/bitcoin,GroestlCoin/bitcoin,fujicoin/fujicoin,yenliangl/bitcoin,rnicoll/dogecoin,mruddy/bitcoin,rnicoll/dogecoin,EthanHeilman/bitcoin,yenliangl/bitcoin,bitcoinsSG/bitcoin,domob1812/bitcoin,n1bor/bitcoin,fanquake/bitcoin,mruddy/bitcoin,dscotese/bitcoin,GroestlCoin/GroestlCoin,sstone/bitcoin,domob1812/bitcoin,fujicoin/fujicoin,GroestlCoin/GroestlCoin,yenliangl/bitcoin,domob1812/bitcoin,qtumproject/qtum,rnicoll/dogecoin,andreaskern/bitcoin,fanquake/bitcoin,mm-s/bitcoin,rnicoll/dogecoin,AkioNak/bitcoin,bitcoinsSG/bitcoin,rnicoll/bitcoin,ajtowns/bitcoin,ajtowns/bitcoin,alecalve/bitcoin,qtumproject/qtum,mruddy/bitcoin,tecnovert/particl-core,mruddy/bitcoin,jamesob/bitcoin,mruddy/bitcoin,n1bor/bitcoin,mm-s/bitcoin,Xekyo/bitcoin,ElementsProject/elements,practicalswift/bitcoin,anditto/bitcoin,pataquets/namecoin-core,bitcoin/bitcoin,particl/particl-core,rnicoll/bitcoin,lateminer/bitcoin,domob1812/bitcoin,GroestlCoin/bitcoin,fujicoin/fujicoin,andreaskern/bitcoin,ElementsProject/elements,mm-s/bitcoin,MeshCollider/bitcoin,JeremyRubin/bitcoin,Xekyo/bitcoin,ElementsProject/elements,jambolo/bitcoin,rnicoll/bitcoin,mm-s/bitcoin,achow101/bitcoin,kallewoof/bitcoin