Revert of [turbofan] Properly handle dictionary maps in the prototype chain. (patchset #1 id:1 of https://codereview.chromium.org/2067423003/ )

Reason for revert:
As discussed offline with Toon, this is not the correct fix here.

Original issue's description:
> [turbofan] Properly handle dictionary maps in the prototype chain.
>
> Dictionary prototypes don't have stable maps, but still don't matter for
> element access. Generalized the JSNativeContextSpecialization a bit to
> handle everything that Crankshaft can handle in this regard.
>
> R=jarin@chromium.org
> BUG=chromium:616709
>
> Committed: https://crrev.com/1c7bdc7f6f4d9512f4982590bd949f265ee9c8c3
> Cr-Commit-Position: refs/heads/master@{#37019}

TBR=jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:616709

Review-Url: https://codereview.chromium.org/2076493002
Cr-Commit-Position: refs/heads/master@{#37029}