I removed the following entries:
.d8_history - afaict, this does not exist anymore. If it exists, it
              would be in the out/ directory and thereby ignored anyways.
/hydrogen.cfg - hydrogen is no more.
/obj - this is now also in the out/ directory.
d8_g - I think this does not exist anymore, or would be in the out/
       directory.
shell - If it still exists, it would be in the out/ directory.
shell_g - same here.

NOTRY=true
R=jkummerow@chromium.org

Bug: v8:9183
Change-Id: Iadb8d2533bfdda1190ec3a31a9ca9c199e087fd5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1660468Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Tamer Tas <tmrts@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62166}