Remove some ignores from export_targets.py. These were fixed upstream. Bug: angleproject:4077 Change-Id: I656616a111e1703f8a910c27e6be3ec3e918f6ba Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1899726 Reviewed-by: Jonah Ryan-Davis <jonahr@google.com> Commit-Queue: Jamie Madill <jmadill@chromium.org>