Delete stale lines from dir.targets (#4013)
Delete stale lines from dir.targets (#4013)

I was looking at diagnostic logs trying to decypher why I'm getting
warnings about some loose *.dll files I have at the root of my drive
that has CoreRT repo, but got distracted by seeing attempts to resolve
things in the /Documentation directory.

This is a set of some old workarounds that used to be in the CoreFX repo
too, but are no longer there. Maybe we don't need them anymore?
yizhang82/corert,gregkalapos/corert,gregkalapos/corert,yizhang82/corert,gregkalapos/corert,shrah/corert,shrah/corert,yizhang82/corert,shrah/corert,shrah/corert,yizhang82/corert,gregkalapos/corert