Remove support for cscoptions.txt
Remove support for cscoptions.txt

dotnet/corefxlab,ravimeda/corefxlab,VSadov/corefxlab,adamsitnik/corefxlab,mafiya69/corefxlab,benaadams/corefxlab,alexperovich/corefxlab,Vedin/corefxlab,joshfree/corefxlab,Vedin/corefxlab,nguerrera/corefxlab,dotnet/corefxlab,stephentoub/corefxlab,hanblee/corefxlab,VSadov/corefxlab,VSadov/corefxlab,ericstj/corefxlab,stephentoub/corefxlab,stephentoub/corefxlab,VSadov/corefxlab,ahsonkhan/corefxlab,stephentoub/corefxlab,tarekgh/corefxlab,ericstj/corefxlab,VSadov/corefxlab,KrzysztofCwalina/corefxlab,ericstj/corefxlab,tarekgh/corefxlab,stephentoub/corefxlab,ericstj/corefxlab,Vedin/corefxlab,ericstj/corefxlab,joshfree/corefxlab,Vedin/corefxlab,whoisj/corefxlab,livarcocc/corefxlab,Vedin/corefxlab,adamsitnik/corefxlab,ericstj/corefxlab,KrzysztofCwalina/corefxlab,ahsonkhan/corefxlab,whoisj/corefxlab,Vedin/corefxlab,benaadams/corefxlab,hanblee/corefxlab,VSadov/corefxlab,weshaggard/corefxlab,stephentoub/corefxlab