Revert of Set lower allocation limit in idle notification only if no GC happend recently. (patchset #2 id:20001 of https://codereview.chromium.org/1143113002/)

Reason for revert:
[Sheriff] MSAN not happy:
http://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/builds/2352

Original issue's description:
> Set lower allocation limit in idle notification only if no GC happend recently.
>
> BUG=475674
> LOG=n
>
> Committed: https://crrev.com/35e3489e8f70c7ad5973324ad3cfa4ab27059ab4
> Cr-Commit-Position: refs/heads/master@{#28506}

TBR=ulan@chromium.org,hpayer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=475674

Review URL: https://codereview.chromium.org/1145113003

Cr-Commit-Position: refs/heads/master@{#28511}