Don't derive grammar in CORE.setting.
Don't derive grammar in CORE.setting.

Fixes an issue reported by donaldh++ where we were declaring a new op
inside of the setting. This caused a new grammar to be derived, which
in turn ended up including fresh NFAs and an entire copy of the source
to end up the file too! Fixing this shaves ~6MB off CORE.setting size,
about 14MB off base memory, and decreases startup time too.

niner/rakudo,labster/rakudo,salortiz/rakudo,labster/rakudo,sjn/rakudo,niner/rakudo,LLFourn/rakudo,tony-o/rakudo,laben/rakudo,raydiak/rakudo,dankogai/rakudo,zhuomingliang/rakudo,retupmoca/rakudo,zhuomingliang/rakudo,MasterDuke17/rakudo,teodozjan/rakudo,nunorc/rakudo,tony-o/rakudo,dankogai/rakudo,lucasbuchala/rakudo,zostay/rakudo,samcv/rakudo,paultcochrane/rakudo,usev6/rakudo,Leont/rakudo,tbrowder/rakudo,zostay/rakudo,b2gills/rakudo,nbrown/rakudo,salortiz/rakudo,usev6/rakudo,awwaiid/rakudo,skids/rakudo,azawawi/rakudo,nbrown/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,lucasbuchala/rakudo,cognominal/rakudo,ungrim97/rakudo,laben/rakudo,dankogai/rakudo,ab5tract/rakudo,cygx/rakudo,teodozjan/rakudo,tony-o/deb-rakudodaily,Gnouc/rakudo,jonathanstowe/rakudo,ugexe/rakudo,lucasbuchala/rakudo,dankogai/rakudo,niner/rakudo,salortiz/rakudo,cygx/rakudo,retupmoca/rakudo,zhuomingliang/rakudo,azawawi/rakudo,lucasbuchala/rakudo,Leont/rakudo,ab5tract/rakudo,tony-o/deb-rakudodaily,ugexe/rakudo,labster/rakudo,MasterDuke17/rakudo,rakudo/rakudo,sjn/rakudo,b2gills/rakudo,Leont/rakudo,cognominal/rakudo,b2gills/rakudo,skids/rakudo,niner/rakudo,skids/rakudo,ab5tract/rakudo,sjn/rakudo,samcv/rakudo,tbrowder/rakudo,laben/rakudo,Gnouc/rakudo,ungrim97/rakudo,nbrown/rakudo,cognominal/rakudo,jonathanstowe/rakudo,nunorc/rakudo,jonathanstowe/rakudo,tbrowder/rakudo,labster/rakudo,tony-o/rakudo,usev6/rakudo,azawawi/rakudo,retupmoca/rakudo,labster/rakudo,salortiz/rakudo,tony-o/deb-rakudodaily,tony-o/rakudo,laben/rakudo,zostay/rakudo,sjn/rakudo,skids/rakudo,raydiak/rakudo,zhuomingliang/rakudo,softmoth/rakudo,sergot/rakudo,azawawi/rakudo,softmoth/rakudo,ab5tract/rakudo,salortiz/rakudo,ugexe/rakudo,ungrim97/rakudo,rakudo/rakudo,sjn/rakudo,softmoth/rakudo,nbrown/rakudo,nbrown/rakudo,lucasbuchala/rakudo,rakudo/rakudo,Gnouc/rakudo,cognominal/rakudo,tbrowder/rakudo,teodozjan/rakudo,zostay/rakudo,tony-o/deb-rakudodaily,nbrown/rakudo,cognominal/rakudo,tony-o/rakudo,ungrim97/rakudo,awwaiid/rakudo,paultcochrane/rakudo,LLFourn/rakudo,sergot/rakudo,tony-o/deb-rakudodaily,Gnouc/rakudo,ugexe/rakudo,awwaiid/rakudo,cygx/rakudo,ab5tract/rakudo,usev6/rakudo,b2gills/rakudo,skids/rakudo,azawawi/rakudo,ungrim97/rakudo,Leont/rakudo,samcv/rakudo,samcv/rakudo,LLFourn/rakudo,sergot/rakudo,cygx/rakudo,jonathanstowe/rakudo,usev6/rakudo,salortiz/rakudo,tony-o/rakudo,ugexe/rakudo,paultcochrane/rakudo,tbrowder/rakudo,rakudo/rakudo,tbrowder/rakudo,jonathanstowe/rakudo,cygx/rakudo,samcv/rakudo,raydiak/rakudo,MasterDuke17/rakudo,awwaiid/rakudo,retupmoca/rakudo,paultcochrane/rakudo,sergot/rakudo,nunorc/rakudo,rakudo/rakudo,rakudo/rakudo,raydiak/rakudo,softmoth/rakudo,nunorc/rakudo,tony-o/deb-rakudodaily,dankogai/rakudo,tony-o/deb-rakudodaily,Gnouc/rakudo,awwaiid/rakudo,teodozjan/rakudo,MasterDuke17/rakudo,b2gills/rakudo,LLFourn/rakudo,LLFourn/rakudo,labster/rakudo,paultcochrane/rakudo,Gnouc/rakudo,softmoth/rakudo