Clean up generated object_tracker.h
Clean up generated object_tracker.h

This file was generated on the trybots dry-running a change that rolls
the vulkan repos [1].  This is causing a build failure on other CLs.

[1] https://chromium-review.googlesource.com/c/angle/angle/+/1405714

Bug: 925077
Change-Id: I3101a4a3fdeb7c38ac5cfe6a1d621e03a9f49071
Reviewed-on: https://chromium-review.googlesource.com/c/1435154
Commit-Queue: Shahbaz Youssefi <582eeec4f08a2ccd61e3ef52115e6e7c571582de@chromium.org>
Reviewed-by: Yuly Novikov <36f5580f63d0a3eacc17e89a61d11e2f646630d2@chromium.org>

ppy/angle,ppy/angle,ppy/angle,ppy/angle