Remove Microsoft-GSL from the manifest.

It's currently unused, and conflicts with a qcom graphics module. Since
we need to rename it, and that will cause disruption for any partners
using it, we may as well just remove it completely and let any
downstream users maintain their own copy however they wish.

Bug: https://issuetracker.google.com/113072504
Bug: https://issuetracker.google.com/145581372
Change-Id: Iabb78f4de4856edcbcbd2d6ea6a1db03b8c2e23e
1 file changed