We don't need these wrappers - we can just use ThrowTypeError from CSA
instead. There were also a bunch of unused runtime functions which we
can just delete.

This CL has no behavior changes.

Change-Id: I5efefd726aff4cca8e8feba6cd05fe8ff5663931
Reviewed-on: https://chromium-review.googlesource.com/906470Reviewed-by: Franziska Hinkelmann <franzih@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51144}