This reverts commit d50c7731.

Reason for revert: Fails on many bots, like:
https://build.chromium.org/p/client.v8/builders/V8%20Linux/builds/23331

Original change's description:
> [bigint] Implement DataView.{get,set}Big*64
> 
> Bug: v8:6791
> Change-Id: I4b5ad3cf68b5c2423d6e055332d7f0dfce7c1e99
> Reviewed-on: https://chromium-review.googlesource.com/929429
> Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#51486}

TBR=jkummerow@chromium.org,neis@chromium.org

Change-Id: I95c260134d7d2671cd4cc0f8c07971af04d97546
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6791
Reviewed-on: https://chromium-review.googlesource.com/932801Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51487}