need to delete global.json

[joeaudette]

Since the server project was updated to .csproj and the new sdk, currently when I try to use the dotnet run command it fails and reports project.json is missing. project.json is no longer used since the update to ,csproj and vs2017 tooling, but the global.son indicates that it needs the older sdk so dotnet run fails since the older sdk used project.json. I deleted the global.json file in my copy and now dotnet run command works as it should, in the absence of that file it uses the newest installed sdk .