remove brew c++ flag
remove brew c++ flag

the c++ is not needed since the listed brew formulas no longer have this option. It also raises a warning that may generate confusion.
jmcorgan/bitcoin,domob1812/bitcoin,jambolo/bitcoin,vmp32k/litecoin,BTCGPU/BTCGPU,bitcoinsSG/bitcoin,starwels/starwels,jmcorgan/bitcoin,donaloconnor/bitcoin,ryanofsky/bitcoin,domob1812/bitcoin,sebrandon1/bitcoin,midnightmagic/bitcoin,namecoin/namecore,vmp32k/litecoin,wellenreiter01/Feathercoin,bitcoinknots/bitcoin,mruddy/bitcoin,guncoin/guncoin,mitchellcash/bitcoin,tjps/bitcoin,Christewart/bitcoin,sebrandon1/bitcoin,Xekyo/bitcoin,yenliangl/bitcoin,andreaskern/bitcoin,midnightmagic/bitcoin,sipsorcery/bitcoin,rnicoll/bitcoin,GroestlCoin/bitcoin,peercoin/peercoin,ppcoin/ppcoin,ElementsProject/elements,1185/starwels,TheBlueMatt/bitcoin,jonasschnelli/bitcoin,dscotese/bitcoin,lateminer/bitcoin,sebrandon1/bitcoin,wellenreiter01/Feathercoin,fujicoin/fujicoin,peercoin/peercoin,namecoin/namecoin-core,mm-s/bitcoin,OmniLayer/omnicore,stamhe/bitcoin,rnicoll/bitcoin,GroestlCoin/GroestlCoin,afk11/bitcoin,maaku/bitcoin,laudaa/bitcoin,kallewoof/bitcoin,RHavar/bitcoin,sebrandon1/bitcoin,joshrabinowitz/bitcoin,tjps/bitcoin,rawodb/bitcoin,kazcw/bitcoin,deeponion/deeponion,jambolo/bitcoin,domob1812/bitcoin,ppcoin/ppcoin,yenliangl/bitcoin,ajtowns/bitcoin,MeshCollider/bitcoin,MeshCollider/bitcoin,practicalswift/bitcoin,joshrabinowitz/bitcoin,jnewbery/bitcoin,GroestlCoin/GroestlCoin,RHavar/bitcoin,myriadcoin/myriadcoin,litecoin-project/litecoin,anditto/bitcoin,Christewart/bitcoin,guncoin/guncoin,AkioNak/bitcoin,namecoin/namecoin-core,deeponion/deeponion,ahmedbodi/vertcoin,MarcoFalke/bitcoin,starwels/starwels,OmniLayer/omnicore,ahmedbodi/vertcoin,qtumproject/qtum,bitcoinsSG/bitcoin,GlobalBoost/GlobalBoost,cdecker/bitcoin,namecoin/namecoin-core,JeremyRubin/bitcoin,CryptArc/bitcoin,monacoinproject/monacoin,randy-waterhouse/bitcoin,Christewart/bitcoin,rawodb/bitcoin,achow101/bitcoin,mm-s/bitcoin,stamhe/bitcoin,mm-s/bitcoin,kazcw/bitcoin,TheBlueMatt/bitcoin,anditto/bitcoin,myriadteam/myriadcoin,ahmedbodi/vertcoin,alecalve/bitcoin,stamhe/bitcoin,apoelstra/bitcoin,particl/particl-core,jamesob/bitcoin,pstratem/bitcoin,bespike/litecoin,andreaskern/bitcoin,jlopp/statoshi,Kogser/bitcoin,myriadcoin/myriadcoin,bitcoinknots/bitcoin,pstratem/bitcoin,domob1812/huntercore,litecoin-project/litecoin,r8921039/bitcoin,rnicoll/bitcoin,laudaa/bitcoin,r8921039/bitcoin,n1bor/bitcoin,GlobalBoost/GlobalBoost,untrustbank/litecoin,thrasher-/litecoin,bitcoinknots/bitcoin,mb300sd/bitcoin,bitcoinsSG/bitcoin,mruddy/bitcoin,achow101/bitcoin,tecnovert/particl-core,wellenreiter01/Feathercoin,Christewart/bitcoin,maaku/bitcoin,prusnak/bitcoin,lbryio/lbrycrd,jlopp/statoshi,achow101/bitcoin,Kogser/bitcoin,viacoin/viacoin,litecoin-project/litecoin,vmp32k/litecoin,practicalswift/bitcoin,mb300sd/bitcoin,peercoin/peercoin,kazcw/bitcoin,achow101/bitcoin,n1bor/bitcoin,Flowdalic/bitcoin,RHavar/bitcoin,TheBlueMatt/bitcoin,DigitalPandacoin/pandacoin,jmcorgan/bitcoin,sipsorcery/bitcoin,tjps/bitcoin,myriadcoin/myriadcoin,ajtowns/bitcoin,practicalswift/bitcoin,globaltoken/globaltoken,ajtowns/bitcoin,mitchellcash/bitcoin,Bushstar/UFO-Project,ppcoin/ppcoin,lateminer/bitcoin,GlobalBoost/GlobalBoost,myriadcoin/myriadcoin,rnicoll/dogecoin,brandonrobertz/namecoin-core,instagibbs/bitcoin,thrasher-/litecoin,thrasher-/litecoin,pstratem/bitcoin,AkioNak/bitcoin,ElementsProject/elements,brandonrobertz/namecoin-core,jmcorgan/bitcoin,AkioNak/bitcoin,dscotese/bitcoin,Bushstar/UFO-Project,lbryio/lbrycrd,JeremyRubin/bitcoin,h4x3rotab/BTCGPU,JeremyRubin/bitcoin,fujicoin/fujicoin,FeatherCoin/Feathercoin,sipsorcery/bitcoin,wellenreiter01/Feathercoin,jambolo/bitcoin,practicalswift/bitcoin,sstone/bitcoin,sebrandon1/bitcoin,practicalswift/bitcoin,cdecker/bitcoin,yenliangl/bitcoin,domob1812/huntercore,anditto/bitcoin,afk11/bitcoin,jamesob/bitcoin,yenliangl/bitcoin,alecalve/bitcoin,ElementsProject/elements,Sjors/bitcoin,h4x3rotab/BTCGPU,sstone/bitcoin,Kogser/bitcoin,afk11/bitcoin,bitcoinsSG/bitcoin,dscotese/bitcoin,pataquets/namecoin-core,tecnovert/particl-core,BTCGPU/BTCGPU,apoelstra/bitcoin,Kogser/bitcoin,fujicoin/fujicoin,jnewbery/bitcoin,namecoin/namecoin-core,Sjors/bitcoin,digibyte/digibyte,myriadteam/myriadcoin,n1bor/bitcoin,AkioNak/bitcoin,jamesob/bitcoin,cdecker/bitcoin,apoelstra/bitcoin,EthanHeilman/bitcoin,randy-waterhouse/bitcoin,Xekyo/bitcoin,ElementsProject/elements,particl/particl-core,namecoin/namecoin-core,viacoin/viacoin,viacoin/viacoin,MazaCoin/maza,MarcoFalke/bitcoin,kallewoof/bitcoin,ryanofsky/bitcoin,EthanHeilman/bitcoin,midnightmagic/bitcoin,jonasschnelli/bitcoin,mruddy/bitcoin,Bushstar/UFO-Project,mb300sd/bitcoin,apoelstra/bitcoin,vertcoin/vertcoin,GroestlCoin/GroestlCoin,pataquets/namecoin-core,CryptArc/bitcoin,Bushstar/UFO-Project,thrasher-/litecoin,donaloconnor/bitcoin,Flowdalic/bitcoin,untrustbank/litecoin,pstratem/bitcoin,mm-s/bitcoin,starwels/starwels,maaku/bitcoin,particl/particl-core,apoelstra/bitcoin,ppcoin/ppcoin,digibyte/digibyte,bitcoinknots/bitcoin,untrustbank/litecoin,prusnak/bitcoin,untrustbank/litecoin,guncoin/guncoin,GroestlCoin/bitcoin,MeshCollider/bitcoin,bitcoin/bitcoin,afk11/bitcoin,rawodb/bitcoin,kazcw/bitcoin,ericshawlinux/bitcoin,pataquets/namecoin-core,fujicoin/fujicoin,maaku/bitcoin,1185/starwels,gjhiggins/vcoincore,cdecker/bitcoin,stamhe/bitcoin,qtumproject/qtum,instagibbs/bitcoin,Bushstar/UFO-Project,andreaskern/bitcoin,fujicoin/fujicoin,globaltoken/globaltoken,gjhiggins/vcoincore,EthanHeilman/bitcoin,Christewart/bitcoin,GlobalBoost/GlobalBoost,deeponion/deeponion,gjhiggins/vcoincore,Sjors/bitcoin,domob1812/huntercore,1185/starwels,joshrabinowitz/bitcoin,r8921039/bitcoin,laudaa/bitcoin,h4x3rotab/BTCGPU,rawodb/bitcoin,donaloconnor/bitcoin,r8921039/bitcoin,CryptArc/bitcoin,myriadteam/myriadcoin,qtumproject/qtum,lateminer/bitcoin,mm-s/bitcoin,bitcoin/bitcoin,h4x3rotab/BTCGPU,paveljanik/bitcoin,digibyte/digibyte,yenliangl/bitcoin,GlobalBoost/GlobalBoost,bespike/litecoin,thrasher-/litecoin,domob1812/namecore,jlopp/statoshi,brandonrobertz/namecoin-core,mitchellcash/bitcoin,Xekyo/bitcoin,droark/bitcoin,ericshawlinux/bitcoin,fujicoin/fujicoin,alecalve/bitcoin,ElementsProject/elements,maaku/bitcoin,andreaskern/bitcoin,Flowdalic/bitcoin,wellenreiter01/Feathercoin,joshrabinowitz/bitcoin,RHavar/bitcoin,alecalve/bitcoin,domob1812/bitcoin,GroestlCoin/GroestlCoin,1185/starwels,r8921039/bitcoin,starwels/starwels,GlobalBoost/GlobalBoost,droark/bitcoin,instagibbs/bitcoin,sebrandon1/bitcoin,mitchellcash/bitcoin,bitcoinsSG/bitcoin,monacoinproject/monacoin,yenliangl/bitcoin,domob1812/bitcoin,monacoinproject/monacoin,mitchellcash/bitcoin,domob1812/namecore,prusnak/bitcoin,sipsorcery/bitcoin,tecnovert/particl-core,brandonrobertz/namecoin-core,vmp32k/litecoin,donaloconnor/bitcoin,lbryio/lbrycrd,instagibbs/bitcoin,lateminer/bitcoin,GroestlCoin/GroestlCoin,sstone/bitcoin,namecoin/namecore,stamhe/bitcoin,viacoin/viacoin,vmp32k/litecoin,JeremyRubin/bitcoin,RHavar/bitcoin,sstone/bitcoin,qtumproject/qtum,MazaCoin/maza,maaku/bitcoin,prusnak/bitcoin,GlobalBoost/GlobalBoost,midnightmagic/bitcoin,DigitalPandacoin/pandacoin,CryptArc/bitcoin,nikkitan/bitcoin,rnicoll/dogecoin,jtimon/bitcoin,sstone/bitcoin,FeatherCoin/Feathercoin,viacoin/viacoin,r8921039/bitcoin,donaloconnor/bitcoin,myriadcoin/myriadcoin,FeatherCoin/Feathercoin,jonasschnelli/bitcoin,rnicoll/bitcoin,domob1812/namecore,myriadteam/myriadcoin,mm-s/bitcoin,MazaCoin/maza,Sjors/bitcoin,alecalve/bitcoin,digibyte/digibyte,midnightmagic/bitcoin,MazaCoin/maza,litecoin-project/litecoin,tjps/bitcoin,rnicoll/dogecoin,sstone/bitcoin,Xekyo/bitcoin,guncoin/guncoin,cdecker/bitcoin,pstratem/bitcoin,FeatherCoin/Feathercoin,domob1812/namecore,tjps/bitcoin,vmp32k/litecoin,particl/particl-core,lbryio/lbrycrd,OmniLayer/omnicore,pataquets/namecoin-core,deeponion/deeponion,BTCGPU/BTCGPU,gjhiggins/vcoincore,ryanofsky/bitcoin,jmcorgan/bitcoin,jtimon/bitcoin,brandonrobertz/namecoin-core,MarcoFalke/bitcoin,prusnak/bitcoin,Sjors/bitcoin,guncoin/guncoin,AkioNak/bitcoin,anditto/bitcoin,nikkitan/bitcoin,bitcoin/bitcoin,TheBlueMatt/bitcoin,jambolo/bitcoin,jnewbery/bitcoin,particl/particl-core,MarcoFalke/bitcoin,ryanofsky/bitcoin,kazcw/bitcoin,wellenreiter01/Feathercoin,qtumproject/qtum,jlopp/statoshi,tjps/bitcoin,Kogser/bitcoin,andreaskern/bitcoin,paveljanik/bitcoin,namecoin/namecore,MazaCoin/maza,vertcoin/vertcoin,DigitalPandacoin/pandacoin,dscotese/bitcoin,TheBlueMatt/bitcoin,droark/bitcoin,rnicoll/bitcoin,fanquake/bitcoin,andreaskern/bitcoin,pataquets/namecoin-core,litecoin-project/litecoin,ericshawlinux/bitcoin,FeatherCoin/Feathercoin,AkioNak/bitcoin,apoelstra/bitcoin,cdecker/bitcoin,MazaCoin/maza,bitcoinknots/bitcoin,domob1812/huntercore,jtimon/bitcoin,droark/bitcoin,bitcoin/bitcoin,domob1812/huntercore,jmcorgan/bitcoin,paveljanik/bitcoin,rnicoll/dogecoin,randy-waterhouse/bitcoin,nikkitan/bitcoin,dscotese/bitcoin,EthanHeilman/bitcoin,myriadteam/myriadcoin,gjhiggins/vcoincore,namecoin/namecore,lbryio/lbrycrd,lateminer/bitcoin,bitcoinsSG/bitcoin,deeponion/deeponion,vertcoin/vertcoin,GroestlCoin/bitcoin,namecoin/namecore,OmniLayer/omnicore,laudaa/bitcoin,instagibbs/bitcoin,ahmedbodi/vertcoin,GroestlCoin/bitcoin,guncoin/guncoin,achow101/bitcoin,namecoin/namecore,anditto/bitcoin,Kogser/bitcoin,ajtowns/bitcoin,DigitalPandacoin/pandacoin,mb300sd/bitcoin,jonasschnelli/bitcoin,ahmedbodi/vertcoin,sipsorcery/bitcoin,gjhiggins/vcoincore,domob1812/huntercore,EthanHeilman/bitcoin,kallewoof/bitcoin,afk11/bitcoin,kallewoof/bitcoin,nikkitan/bitcoin,untrustbank/litecoin,peercoin/peercoin,BTCGPU/BTCGPU,TheBlueMatt/bitcoin,rnicoll/dogecoin,brandonrobertz/namecoin-core,sipsorcery/bitcoin,mitchellcash/bitcoin,randy-waterhouse/bitcoin,thrasher-/litecoin,jtimon/bitcoin,GroestlCoin/bitcoin,ajtowns/bitcoin,JeremyRubin/bitcoin,joshrabinowitz/bitcoin,jamesob/bitcoin,myriadcoin/myriadcoin,1185/starwels,MeshCollider/bitcoin,instagibbs/bitcoin,ericshawlinux/bitcoin,domob1812/namecore,Flowdalic/bitcoin,tecnovert/particl-core,FeatherCoin/Feathercoin,donaloconnor/bitcoin,deeponion/deeponion,RHavar/bitcoin,paveljanik/bitcoin,ajtowns/bitcoin,ElementsProject/elements,CryptArc/bitcoin,qtumproject/qtum,Kogser/bitcoin,untrustbank/litecoin,domob1812/namecore,qtumproject/qtum,myriadteam/myriadcoin,1185/starwels,bespike/litecoin,droark/bitcoin,stamhe/bitcoin,mruddy/bitcoin,starwels/starwels,mb300sd/bitcoin,n1bor/bitcoin,OmniLayer/omnicore,fanquake/bitcoin,vertcoin/vertcoin,Xekyo/bitcoin,Flowdalic/bitcoin,paveljanik/bitcoin,particl/particl-core,globaltoken/globaltoken,laudaa/bitcoin,fanquake/bitcoin,anditto/bitcoin,Xekyo/bitcoin,jlopp/statoshi,monacoinproject/monacoin,fanquake/bitcoin,Kogser/bitcoin,ericshawlinux/bitcoin,midnightmagic/bitcoin,GroestlCoin/GroestlCoin,bitcoin/bitcoin,mruddy/bitcoin,peercoin/peercoin,rawodb/bitcoin,digibyte/digibyte,randy-waterhouse/bitcoin,namecoin/namecoin-core,bespike/litecoin,bespike/litecoin,OmniLayer/omnicore,n1bor/bitcoin,CryptArc/bitcoin,h4x3rotab/BTCGPU,GroestlCoin/bitcoin,nikkitan/bitcoin,pstratem/bitcoin,viacoin/viacoin,jonasschnelli/bitcoin,MeshCollider/bitcoin,JeremyRubin/bitcoin,rawodb/bitcoin,jlopp/statoshi,monacoinproject/monacoin,nikkitan/bitcoin,n1bor/bitcoin,starwels/starwels,alecalve/bitcoin,droark/bitcoin,laudaa/bitcoin,tecnovert/particl-core,lbryio/lbrycrd,jtimon/bitcoin,lateminer/bitcoin,vertcoin/vertcoin,pataquets/namecoin-core,ericshawlinux/bitcoin,vertcoin/vertcoin,Christewart/bitcoin,Flowdalic/bitcoin,kallewoof/bitcoin,tecnovert/particl-core,globaltoken/globaltoken,bespike/litecoin,achow101/bitcoin,mruddy/bitcoin,jtimon/bitcoin,monacoinproject/monacoin,peercoin/peercoin,Kogser/bitcoin,Kogser/bitcoin,fanquake/bitcoin,Kogser/bitcoin,prusnak/bitcoin,lbryio/lbrycrd,kazcw/bitcoin,fanquake/bitcoin,ryanofsky/bitcoin,jamesob/bitcoin,jambolo/bitcoin,mb300sd/bitcoin,h4x3rotab/BTCGPU,MarcoFalke/bitcoin,bitcoin/bitcoin,randy-waterhouse/bitcoin,BTCGPU/BTCGPU,digibyte/digibyte,jambolo/bitcoin,globaltoken/globaltoken,domob1812/bitcoin,paveljanik/bitcoin,DigitalPandacoin/pandacoin,Kogser/bitcoin,ahmedbodi/vertcoin,DigitalPandacoin/pandacoin,jnewbery/bitcoin,joshrabinowitz/bitcoin,jamesob/bitcoin,Bushstar/UFO-Project,dscotese/bitcoin,MeshCollider/bitcoin,BTCGPU/BTCGPU,EthanHeilman/bitcoin,practicalswift/bitcoin,ryanofsky/bitcoin,rnicoll/bitcoin,MarcoFalke/bitcoin,litecoin-project/litecoin,jnewbery/bitcoin,afk11/bitcoin,kallewoof/bitcoin,globaltoken/globaltoken