- Now that services are being flowed through the entire stack
we can nuke the csc service and always use the roslyn based compilation for views
- The RoslynCompilationService is still very much a prototype but it's a good
step to see what other services might may or may not need to flow.
- Removed the PhysicalFileSystem construction from Mvc itself. This will come from
the hosting layer and is newed up temporarily in the PathBasedViewFactory itself.
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