Revert of [csa] Add assertions to CSA (patchset #14 id:260001 of https://codereview.chromium.org/2847923003/ )

Reason for revert:
Linux-nosnap failures:

https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/13282

Original issue's description:
> [csa] Add assertions to CSA
>
> This adds a bunch of assertions to CSA, mostly about documenting and checking
> parameter types.
>
> Drive-by-change: Removed unused function.
>
> BUG=v8:6325
>
> Review-Url: https://codereview.chromium.org/2847923003
> Cr-Original-Commit-Position: refs/heads/master@{#45398}
> Committed: https://chromium.googlesource.com/v8/v8/+/b14a981496ad1f841683479d2f9188dfa2d6b4bd
> Review-Url: https://codereview.chromium.org/2847923003
> Cr-Commit-Position: refs/heads/master@{#45443}
> Committed: https://chromium.googlesource.com/v8/v8/+/62b0de1ef53816d6dae3fa519a846f942b701dda

TBR=cbruni@chromium.org,ishell@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:6325

Review-Url: https://codereview.chromium.org/2893253002
Cr-Commit-Position: refs/heads/master@{#45445}