Remove incorrectly added broken submodule 'internal_gyp'

This was inadvertantly added in http://crrev.com/39254f02 and breaks
fetch of the code for new checkouts.

Bug: None
Change-Id: Icc6c0fa436b474cc3dd5d05fbc552a5a3df5402a

TBR=sky@chromium.org

Change-Id: Icc6c0fa436b474cc3dd5d05fbc552a5a3df5402a
Reviewed-on: https://chromium-review.googlesource.com/1216442Reviewed-by: Stephen McGruer <smcgruer@chromium.org>
Commit-Queue: Stephen McGruer <smcgruer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589914}

internal_gyp @ 128f0231

-Subproject commit 128f0231ca813adf99c95acb37056dadfb9f50e7