This reverts commit b90e83f5.

Reason for revert: Blocks roll:
https://chromium-review.googlesource.com/c/570002/

Confirmed by:
https://chromium-review.googlesource.com/c/571700/2

Original change's description:
> [runtime] Add shortcuts for elements kinds transitions.
> 
> The shortcuts ensure that field type generalization is properly
> propagated in the transition graph.
> 
> Bug: chromium:738763
> Change-Id: Id701a6f95ed6ea093c707fbe0bac228f1f856e9f
> Reviewed-on: https://chromium-review.googlesource.com/567992
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46622}

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

Change-Id: I5ede80db6bc209f16c6fd43f6bf3c8865c9577d8
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:738763
Reviewed-on: https://chromium-review.googlesource.com/571741Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46660}