build: remove -Wdeprecated-register from NOWARN flags
build: remove -Wdeprecated-register from NOWARN flags

The register keyword was deprecated in C++11, and removed in C++17. Now
that we require C++17, we shouldn't have to supress warnings for a
non-existant feature.

jambolo/bitcoin,namecoin/namecore,ElementsProject/elements,ElementsProject/elements,MarcoFalke/bitcoin,bitcoinsSG/bitcoin,apoelstra/bitcoin,bitcoinsSG/bitcoin,GroestlCoin/GroestlCoin,apoelstra/bitcoin,lateminer/bitcoin,namecoin/namecoin-core,fanquake/bitcoin,dscotese/bitcoin,bitcoinknots/bitcoin,bitcoin/bitcoin,tecnovert/particl-core,sstone/bitcoin,yenliangl/bitcoin,lateminer/bitcoin,MarcoFalke/bitcoin,Xekyo/bitcoin,ajtowns/bitcoin,domob1812/bitcoin,GroestlCoin/GroestlCoin,anditto/bitcoin,MarcoFalke/bitcoin,ElementsProject/elements,mruddy/bitcoin,tecnovert/particl-core,ElementsProject/elements,domob1812/namecore,dscotese/bitcoin,Xekyo/bitcoin,sipsorcery/bitcoin,rnicoll/bitcoin,jambolo/bitcoin,prusnak/bitcoin,anditto/bitcoin,namecoin/namecoin-core,JeremyRubin/bitcoin,andreaskern/bitcoin,particl/particl-core,bitcoin/bitcoin,bitcoinknots/bitcoin,qtumproject/qtum,mm-s/bitcoin,jlopp/statoshi,yenliangl/bitcoin,domob1812/bitcoin,qtumproject/qtum,Xekyo/bitcoin,sipsorcery/bitcoin,mruddy/bitcoin,apoelstra/bitcoin,qtumproject/qtum,sipsorcery/bitcoin,bitcoinsSG/bitcoin,yenliangl/bitcoin,tecnovert/particl-core,domob1812/namecore,jambolo/bitcoin,fujicoin/fujicoin,prusnak/bitcoin,pataquets/namecoin-core,bitcoin/bitcoin,bitcoin/bitcoin,anditto/bitcoin,lateminer/bitcoin,fujicoin/fujicoin,AkioNak/bitcoin,namecoin/namecore,dscotese/bitcoin,particl/particl-core,lateminer/bitcoin,fanquake/bitcoin,rnicoll/bitcoin,kallewoof/bitcoin,achow101/bitcoin,yenliangl/bitcoin,lateminer/bitcoin,GroestlCoin/GroestlCoin,pataquets/namecoin-core,rnicoll/bitcoin,namecoin/namecore,prusnak/bitcoin,qtumproject/qtum,AkioNak/bitcoin,fanquake/bitcoin,dscotese/bitcoin,fanquake/bitcoin,bitcoin/bitcoin,andreaskern/bitcoin,kallewoof/bitcoin,kallewoof/bitcoin,fujicoin/fujicoin,jlopp/statoshi,AkioNak/bitcoin,anditto/bitcoin,achow101/bitcoin,jamesob/bitcoin,bitcoinsSG/bitcoin,bitcoinsSG/bitcoin,namecoin/namecoin-core,GroestlCoin/bitcoin,fujicoin/fujicoin,instagibbs/bitcoin,lateminer/bitcoin,JeremyRubin/bitcoin,mm-s/bitcoin,mm-s/bitcoin,MarcoFalke/bitcoin,bitcoinknots/bitcoin,JeremyRubin/bitcoin,jlopp/statoshi,AkioNak/bitcoin,GroestlCoin/bitcoin,jlopp/statoshi,GroestlCoin/GroestlCoin,mm-s/bitcoin,ajtowns/bitcoin,mruddy/bitcoin,apoelstra/bitcoin,rnicoll/bitcoin,domob1812/bitcoin,anditto/bitcoin,anditto/bitcoin,bitcoin/bitcoin,sstone/bitcoin,fujicoin/fujicoin,mruddy/bitcoin,jambolo/bitcoin,instagibbs/bitcoin,namecoin/namecoin-core,namecoin/namecore,sipsorcery/bitcoin,prusnak/bitcoin,kallewoof/bitcoin,qtumproject/qtum,particl/particl-core,particl/particl-core,mruddy/bitcoin,tecnovert/particl-core,fujicoin/fujicoin,achow101/bitcoin,domob1812/namecore,jlopp/statoshi,ElementsProject/elements,jamesob/bitcoin,AkioNak/bitcoin,pataquets/namecoin-core,GroestlCoin/bitcoin,prusnak/bitcoin,JeremyRubin/bitcoin,instagibbs/bitcoin,Xekyo/bitcoin,achow101/bitcoin,domob1812/bitcoin,particl/particl-core,pataquets/namecoin-core,GroestlCoin/bitcoin,qtumproject/qtum,namecoin/namecoin-core,Xekyo/bitcoin,jamesob/bitcoin,dscotese/bitcoin,GroestlCoin/GroestlCoin,ajtowns/bitcoin,domob1812/bitcoin,sstone/bitcoin,domob1812/bitcoin,qtumproject/qtum,rnicoll/bitcoin,MarcoFalke/bitcoin,fanquake/bitcoin,GroestlCoin/bitcoin,sstone/bitcoin,andreaskern/bitcoin,namecoin/namecoin-core,achow101/bitcoin,domob1812/namecore,AkioNak/bitcoin,prusnak/bitcoin,namecoin/namecore,jlopp/statoshi,instagibbs/bitcoin,tecnovert/particl-core,yenliangl/bitcoin,JeremyRubin/bitcoin,bitcoinknots/bitcoin,GroestlCoin/bitcoin,jamesob/bitcoin,ajtowns/bitcoin,bitcoinsSG/bitcoin,jambolo/bitcoin,yenliangl/bitcoin,Xekyo/bitcoin,kallewoof/bitcoin,fanquake/bitcoin,sipsorcery/bitcoin,domob1812/namecore,tecnovert/particl-core,ajtowns/bitcoin,mm-s/bitcoin,domob1812/namecore,ajtowns/bitcoin,pataquets/namecoin-core,andreaskern/bitcoin,jambolo/bitcoin,dscotese/bitcoin,andreaskern/bitcoin,kallewoof/bitcoin,andreaskern/bitcoin,instagibbs/bitcoin,MarcoFalke/bitcoin,sipsorcery/bitcoin,mruddy/bitcoin,apoelstra/bitcoin,JeremyRubin/bitcoin,sstone/bitcoin,mm-s/bitcoin,ElementsProject/elements,pataquets/namecoin-core,jamesob/bitcoin,particl/particl-core,sstone/bitcoin,instagibbs/bitcoin,achow101/bitcoin,namecoin/namecore,bitcoinknots/bitcoin,apoelstra/bitcoin,GroestlCoin/GroestlCoin,rnicoll/bitcoin,jamesob/bitcoin