Remove hg-migrate code from when we moved the location of pnacl hg checkouts.
Remove hg-migrate code from when we moved the location of pnacl hg checkouts.

None of the bots and non-bots should have the old checkout anymore.

BUG=none
R=dschuff@chromium.org

Review URL: https://codereview.chromium.org/14602018

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11286 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client