Hygine cleanups in holders.h
Hygine cleanups in holders.h

Use "= delete" syntax to make it clear the IcuHolder copy constructor
and assignment opperators are removed.

Remove superfluous "public" modifier on the struct closers used by the
IcuHolders.

iamjasonp/coreclr,andschwa/coreclr,Dmitry-Me/coreclr,yeaicc/coreclr,cmckinsey/coreclr,russellhadley/coreclr,YongseopKim/coreclr,manu-silicon/coreclr,schellap/coreclr,dasMulli/coreclr,krytarowski/coreclr,cshung/coreclr,schellap/coreclr,wkchoy74/coreclr,taylorjonl/coreclr,neurospeech/coreclr,blackdwarf/coreclr,bartdesmet/coreclr,ragmani/coreclr,martinwoodward/coreclr,chuck-mitchell/coreclr,mokchhya/coreclr,roncain/coreclr,JosephTremoulet/coreclr,cmckinsey/coreclr,mocsy/coreclr,neurospeech/coreclr,bartonjs/coreclr,hseok-oh/coreclr,sperling/coreclr,Godin/coreclr,Lucrecious/coreclr,jamesqo/coreclr,James-Ko/coreclr,JosephTremoulet/coreclr,schellap/coreclr,bitcrazed/coreclr,LLITCHEV/coreclr,botaberg/coreclr,cmckinsey/coreclr,jhendrixMSFT/coreclr,neurospeech/coreclr,mocsy/coreclr,jamesqo/coreclr,rartemev/coreclr,andschwa/coreclr,SlavaRa/coreclr,JonHanna/coreclr,krk/coreclr,russellhadley/coreclr,iamjasonp/coreclr,ZhichengZhu/coreclr,stormleoxia/coreclr,sperling/coreclr,sjsinju/coreclr,wkchoy74/coreclr,andschwa/coreclr,taylorjonl/coreclr,josteink/coreclr,YongseopKim/coreclr,ruben-ayrapetyan/coreclr,wkchoy74/coreclr,swgillespie/coreclr,krytarowski/coreclr,taylorjonl/coreclr,chuck-mitchell/coreclr,krk/coreclr,bitcrazed/coreclr,schellap/coreclr,qiudesong/coreclr,ZhichengZhu/coreclr,sperling/coreclr,botaberg/coreclr,shahid-pk/coreclr,Dmitry-Me/coreclr,swgillespie/coreclr,qiudesong/coreclr,kyulee1/coreclr,wtgodbe/coreclr,yizhang82/coreclr,mmitche/coreclr,krytarowski/coreclr,dpodder/coreclr,dasMulli/coreclr,jhendrixMSFT/coreclr,ruben-ayrapetyan/coreclr,neurospeech/coreclr,sjsinju/coreclr,AlexGhiondea/coreclr,mocsy/coreclr,ZhichengZhu/coreclr,Godin/coreclr,yeaicc/coreclr,LLITCHEV/coreclr,hseok-oh/coreclr,andschwa/coreclr,andschwa/coreclr,pgavlin/coreclr,JonHanna/coreclr,dpodder/coreclr,vinnyrom/coreclr,mokchhya/coreclr,KrzysztofCwalina/coreclr,neurospeech/coreclr,botaberg/coreclr,manu-silicon/coreclr,dpodder/coreclr,KrzysztofCwalina/coreclr,KrzysztofCwalina/coreclr,AlfredoMS/coreclr,roncain/coreclr,swgillespie/coreclr,bartdesmet/coreclr,parjong/coreclr,cmckinsey/coreclr,chuck-mitchell/coreclr,chuck-mitchell/coreclr,ragmani/coreclr,bartdesmet/coreclr,josteink/coreclr,Lucrecious/coreclr,benpye/coreclr,sjsinju/coreclr,yizhang82/coreclr,parjong/coreclr,SlavaRa/coreclr,James-Ko/coreclr,ktos/coreclr,benpye/coreclr,hseok-oh/coreclr,poizan42/coreclr,YongseopKim/coreclr,ramarag/coreclr,KrzysztofCwalina/coreclr,naamunds/coreclr,iamjasonp/coreclr,Dmitry-Me/coreclr,russellhadley/coreclr,pgavlin/coreclr,stormleoxia/coreclr,mokchhya/coreclr,mokchhya/coreclr,bitcrazed/coreclr,bartonjs/coreclr,wkchoy74/coreclr,mmitche/coreclr,mskvortsov/coreclr,wateret/coreclr,vinnyrom/coreclr,sjsinju/coreclr,YongseopKim/coreclr,gkhanna79/coreclr,sejongoh/coreclr,ragmani/coreclr,James-Ko/coreclr,mokchhya/coreclr,KrzysztofCwalina/coreclr,yeaicc/coreclr,rartemev/coreclr,geertdoornbos/coreclr,tijoytom/coreclr,jhendrixMSFT/coreclr,mocsy/coreclr,cydhaselton/coreclr,yeaicc/coreclr,ZhichengZhu/coreclr,shahid-pk/coreclr,blackdwarf/coreclr,Dmitry-Me/coreclr,ktos/coreclr,jhendrixMSFT/coreclr,botaberg/coreclr,SlavaRa/coreclr,parjong/coreclr,ruben-ayrapetyan/coreclr,poizan42/coreclr,bartdesmet/coreclr,JosephTremoulet/coreclr,cydhaselton/coreclr,AlexGhiondea/coreclr,ruben-ayrapetyan/coreclr,benpye/coreclr,vinnyrom/coreclr,russellhadley/coreclr,martinwoodward/coreclr,stormleoxia/coreclr,ruben-ayrapetyan/coreclr,ramarag/coreclr,tijoytom/coreclr,schellap/coreclr,cydhaselton/coreclr,mokchhya/coreclr,chuck-mitchell/coreclr,wkchoy74/coreclr,ragmani/coreclr,sagood/coreclr,alexperovich/coreclr,dasMulli/coreclr,KrzysztofCwalina/coreclr,vinnyrom/coreclr,poizan42/coreclr,Dmitry-Me/coreclr,iamjasonp/coreclr,pgavlin/coreclr,JonHanna/coreclr,mmitche/coreclr,wtgodbe/coreclr,tijoytom/coreclr,yizhang82/coreclr,josteink/coreclr,tijoytom/coreclr,mskvortsov/coreclr,dpodder/coreclr,krk/coreclr,Godin/coreclr,parjong/coreclr,hseok-oh/coreclr,kyulee1/coreclr,rartemev/coreclr,ragmani/coreclr,tijoytom/coreclr,bartonjs/coreclr,swgillespie/coreclr,poizan42/coreclr,geertdoornbos/coreclr,ramarag/coreclr,bartonjs/coreclr,bartonjs/coreclr,taylorjonl/coreclr,KrzysztofCwalina/coreclr,pgavlin/coreclr,mmitche/coreclr,ktos/coreclr,mskvortsov/coreclr,hseok-oh/coreclr,dasMulli/coreclr,Lucrecious/coreclr,AlfredoMS/coreclr,shahid-pk/coreclr,krytarowski/coreclr,swgillespie/coreclr,manu-silicon/coreclr,poizan42/coreclr,benpye/coreclr,Godin/coreclr,AlfredoMS/coreclr,ramarag/coreclr,blackdwarf/coreclr,gkhanna79/coreclr,geertdoornbos/coreclr,wateret/coreclr,AlfredoMS/coreclr,manu-silicon/coreclr,yizhang82/coreclr,jamesqo/coreclr,rartemev/coreclr,wtgodbe/coreclr,wateret/coreclr,sejongoh/coreclr,sjsinju/coreclr,bartdesmet/coreclr,wateret/coreclr,AlexGhiondea/coreclr,krk/coreclr,russellhadley/coreclr,wtgodbe/coreclr,cmckinsey/coreclr,vinnyrom/coreclr,JosephTremoulet/coreclr,kyulee1/coreclr,martinwoodward/coreclr,sejongoh/coreclr,James-Ko/coreclr,bartonjs/coreclr,bitcrazed/coreclr,stormleoxia/coreclr,rartemev/coreclr,dpodder/coreclr,naamunds/coreclr,taylorjonl/coreclr,krytarowski/coreclr,martinwoodward/coreclr,cshung/coreclr,YongseopKim/coreclr,cydhaselton/coreclr,sejongoh/coreclr,swgillespie/coreclr,stormleoxia/coreclr,geertdoornbos/coreclr,josteink/coreclr,Godin/coreclr,wateret/coreclr,martinwoodward/coreclr,botaberg/coreclr,mmitche/coreclr,jamesqo/coreclr,sejongoh/coreclr,mokchhya/coreclr,ramarag/coreclr,SlavaRa/coreclr,roncain/coreclr,wkchoy74/coreclr,geertdoornbos/coreclr,Godin/coreclr,hseok-oh/coreclr,roncain/coreclr,stormleoxia/coreclr,parjong/coreclr,qiudesong/coreclr,ktos/coreclr,parjong/coreclr,benpye/coreclr,ZhichengZhu/coreclr,botaberg/coreclr,mocsy/coreclr,Lucrecious/coreclr,sagood/coreclr,cshung/coreclr,alexperovich/coreclr,tijoytom/coreclr,cshung/coreclr,ktos/coreclr,naamunds/coreclr,shahid-pk/coreclr,dpodder/coreclr,alexperovich/coreclr,LLITCHEV/coreclr,bitcrazed/coreclr,cshung/coreclr,andschwa/coreclr,andschwa/coreclr,James-Ko/coreclr,ZhichengZhu/coreclr,blackdwarf/coreclr,AlexGhiondea/coreclr,sagood/coreclr,shahid-pk/coreclr,gkhanna79/coreclr,dasMulli/coreclr,wkchoy74/coreclr,wateret/coreclr,wtgodbe/coreclr,krk/coreclr,roncain/coreclr,pgavlin/coreclr,poizan42/coreclr,ktos/coreclr,manu-silicon/coreclr,ktos/coreclr,bartdesmet/coreclr,mmitche/coreclr,LLITCHEV/coreclr,jhendrixMSFT/coreclr,manu-silicon/coreclr,mocsy/coreclr,martinwoodward/coreclr,cmckinsey/coreclr,schellap/coreclr,Lucrecious/coreclr,AlexGhiondea/coreclr,vinnyrom/coreclr,sejongoh/coreclr,taylorjonl/coreclr,SlavaRa/coreclr,yeaicc/coreclr,shahid-pk/coreclr,sagood/coreclr,chuck-mitchell/coreclr,sperling/coreclr,iamjasonp/coreclr,blackdwarf/coreclr,roncain/coreclr,mocsy/coreclr,kyulee1/coreclr,benpye/coreclr,ragmani/coreclr,sperling/coreclr,cshung/coreclr,Godin/coreclr,geertdoornbos/coreclr,alexperovich/coreclr,JosephTremoulet/coreclr,benpye/coreclr,sperling/coreclr,iamjasonp/coreclr,kyulee1/coreclr,geertdoornbos/coreclr,jamesqo/coreclr,yizhang82/coreclr,krytarowski/coreclr,dasMulli/coreclr,mskvortsov/coreclr,chuck-mitchell/coreclr,naamunds/coreclr,ramarag/coreclr,AlexGhiondea/coreclr,Dmitry-Me/coreclr,blackdwarf/coreclr,Dmitry-Me/coreclr,josteink/coreclr,cydhaselton/coreclr,josteink/coreclr,JosephTremoulet/coreclr,alexperovich/coreclr,cydhaselton/coreclr,alexperovich/coreclr,James-Ko/coreclr,roncain/coreclr,sperling/coreclr,rartemev/coreclr,cmckinsey/coreclr,shahid-pk/coreclr,jamesqo/coreclr,krk/coreclr,gkhanna79/coreclr,sjsinju/coreclr,russellhadley/coreclr,taylorjonl/coreclr,Lucrecious/coreclr,qiudesong/coreclr,neurospeech/coreclr,naamunds/coreclr,JonHanna/coreclr,sejongoh/coreclr,bartonjs/coreclr,JonHanna/coreclr,kyulee1/coreclr,YongseopKim/coreclr,dasMulli/coreclr,LLITCHEV/coreclr,qiudesong/coreclr,gkhanna79/coreclr,pgavlin/coreclr,LLITCHEV/coreclr,JonHanna/coreclr,yeaicc/coreclr,sagood/coreclr,ZhichengZhu/coreclr,swgillespie/coreclr,SlavaRa/coreclr,stormleoxia/coreclr,schellap/coreclr,gkhanna79/coreclr,yeaicc/coreclr,LLITCHEV/coreclr,mskvortsov/coreclr,sagood/coreclr,AlfredoMS/coreclr,wtgodbe/coreclr,martinwoodward/coreclr,jhendrixMSFT/coreclr,Lucrecious/coreclr,bitcrazed/coreclr,josteink/coreclr,ruben-ayrapetyan/coreclr,naamunds/coreclr,mskvortsov/coreclr,bitcrazed/coreclr,AlfredoMS/coreclr,jhendrixMSFT/coreclr,manu-silicon/coreclr,blackdwarf/coreclr,qiudesong/coreclr,yizhang82/coreclr,bartdesmet/coreclr,naamunds/coreclr,ramarag/coreclr,vinnyrom/coreclr