This reverts commit bca38dbf.

Reason for revert: Makes ODROIDs flaky.
BUG=v8:8086

Original change's description:
> [Tests] Fix some OOM failures on Android by explicitly setting max_old_space_size.
>
> BUG=v8:8040
>
> Change-Id: I8de22af3978f2a8eb844eabdb757bd635050f901
> Reviewed-on: https://chromium-review.googlesource.com/1181432
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#55227}

TBR=ulan@chromium.org,rmcilroy@chromium.org

Bug: v8:8040
Change-Id: Ife980e8706ebbff4d86d87739c2f621d7a976039
Reviewed-on: https://chromium-review.googlesource.com/1188322
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55391}