Remove endpoint info, runtime info, and command line helper.

[jander-msft]

These types are moving to the dotnet-monitor repo since the other diagnostic tools do not use them, we don't anticipate that they will use them, and allows dotnet-monitor to simplify the abstractions that it has in place due to the separation across the repos. The PR to move them to dotnet-monitor is dotnet/dotnet-monitor#451

cc @josalem, @hoyosjs

[jander-msft]

@dotnet/dotnet-diag : Could I get approval on this? The PR to copy these to dotnet-monitor has been merged: dotnet/dotnet-monitor#451

[josalem]

Before we remove this code -- @lateralusX don't you use some of these types in dsrouter?

[jander-msft]

Before we remove this code -- @lateralusX don't you use some of these types in dsrouter?

I didn't find any code usage unless it is being used via reflection. But a cursory look says that it is not used.

dsrouter does use IpcEndpointInfo which is in NETCore.Client assembly, but that is a different type than the IEndpiontInfo interface and *EndpointInfoSource types.

[josalem]

If there isn't any usage outside dotnet-monitor, I'm okay removing this code since it's already in the dotnet-monitor repo.