Remove AsJs and AsCss extension in FormatterExtensions

[thecodejunkie]

They were marked Obsolete in 0.11 in favor of using static content conventions

[grumpydev]

Do we still want to do this?

[thecodejunkie]

I think we should remove them. The real question is, has enough time passed since 0.11 or should we wait a bit longer?

[jchannon]

I think this can be closed 😄