Revert of [strong] Add tests for loading from proxy, super, with access checks (patchset #4 id:80001 of https://codereview.chromium.org/1193633003/)

Reason for revert:
[Sheriff] Breaks gc stress:
http://build.chromium.org/p/client.v8/builders/V8%20GC%20Stress%20-%202/builds/3968

Original issue's description:
> [strong] Add tests for loading from proxy, super, with access checks
>
> Followup for https://codereview.chromium.org/1168093002/
>
> These seem to already function correctly without the need for further runtime
> changes.
>
> There will be a final follow-up for interceptors.
>
> BUG=v8:3956
> LOG=N
>
> Committed: https://crrev.com/ea4e568363f48955e7de6b538e559132e9899c86
> Cr-Commit-Position: refs/heads/master@{#29389}

TBR=rossberg@chromium.org,conradw@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3956

Review URL: https://codereview.chromium.org/1218123003

Cr-Commit-Position: refs/heads/master@{#29390}