This reverts commit 61523c45.

Reason for revert: https://ci.chromium.org/p/v8/builders/ci/V8%20Win32%20-%20debug/20396

Original change's description:
> Move deoptimizer files
> 
> Bug: v8:9247
> Change-Id: I6287907edb8a36225bfa9fe864305ea59c20dd8b
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1617667
> Commit-Queue: Yang Guo <yangguo@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#61648}

TBR=yangguo@chromium.org,mstarzinger@chromium.org,jarin@chromium.org,bmeurer@chromium.org

Change-Id: Icf258f7bc409ef0c360cfa82029bfc45a41dc75f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9247
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1619749Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61650}