Revert of [turbofan] Greedy: using hints (patchset #2 id:60001 of https://codereview.chromium.org/1329493004/ )

Reason for revert:
http://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20debug%20-%20greedy%20allocator/builds/1338

Original issue's description:
> [turbofan] Greedy: using hints
>
> This is a rudimentary introduction of hints. Primarily this helps with
> allocating on the same register variables are defined (from instructions)
> For dealing with phis, we need to introduce groups, in a subsequent
> CL.
>
> From the last CL (memory ops heuristics), this CL improves some
> benchmarks - notably Life (11.94%) in Emscripten x64, and Memops
> (Emscripten), 24% on x86; notable regressions: Memops in
> AreWeFastYet (-14%, x64) and Corrections -25% on x86.
>
> BUG=
>
> Committed: https://crrev.com/038f5eaf3bd6796ed6b7519de83c21d4e1f54850
> Cr-Commit-Position: refs/heads/master@{#30534}

TBR=jarin@chromium.org,bmeurer@chromium.org,mtrofin@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1324763005

Cr-Commit-Position: refs/heads/master@{#30537}