Revert of [stubs] Port String.prototype.substring to TurboFan (patchset #5 id:80001 of https://codereview.chromium.org/2358133004/ )

Reason for revert:
Blocks roll: https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/10075

Original issue's description:
> [stubs] Port String.prototype.substring to TurboFan
>
> BUG=v8:5415
>
> Committed: https://crrev.com/cc37dff7ba21345b3a867a86127a208e34a3f707
> Cr-Commit-Position: refs/heads/master@{#39717}

TBR=ishell@chromium.org,jgruber@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5415

Review-Url: https://codereview.chromium.org/2369003002
Cr-Commit-Position: refs/heads/master@{#39724}