Revert "build_packages: Bump backtrack to 1000"

This reverts commit 3d02205d450b7fb904919979d676c81a4eb806e9.

Reason for revert: Not needed anymore ... cleanup

Original change's description:
> build_packages: Bump backtrack to 1000
>
> Stale binpkgs are starting to multiply, and portage at the moment
> isn't appearing to figure out that some of them can't be used anymore,
> likely as --backtack=30 just isn't big enough to do that.
>
> The risk of increasing --backtrack further is that we may just hang
> longer calculating dependencies (possibly past the death of the
> universe), but at least we won't ever try and use binpkgs that we
> can't.  If this change ends up making things worse, we can just revert
> it.
>
> BUG=b:214297402
> TEST=CQ
>
> Change-Id: I6624658cdbd8904af01eb5293f687d4cbd415d46
> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/3383660
> Tested-by: Jack Rosenthal <jrosenth@chromium.org>
> Reviewed-by: George Engelbrecht <engeg@google.com>
> Reviewed-by: Joshua Emele <jemele@chromium.org>
> Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
> Commit-Queue: Jack Rosenthal <jrosenth@chromium.org>

Bug: b:214297402
Change-Id: Ife0671d9985a2ed64ce4284944ea4ccd2e14d24b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/3390873
Tested-by: Jack Rosenthal <jrosenth@chromium.org>
Auto-Submit: Jack Rosenthal <jrosenth@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Sergey Frolov <sfrolov@google.com>
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Reviewed-by: Joshua Emele <jemele@chromium.org>
Commit-Queue: Jack Rosenthal <jrosenth@chromium.org>
1 file changed