[llvm] [IR] Remove options to make scalable TypeSize access a warning (PR #156336)

[David Spickett via llvm-commits]

DavidSpickett wrote:

Linaro has buildbots using this option, for example https://github.com/llvm/llvm-zorg/blob/2b44506b85cf6d604d36e8b8c882a35cbf508d3f/buildbot/osuosl/master/config/builders.py#L481.

We did so at the request of Arm, so if the reviewers here agree with this change I will do the changes for llvm-zorg.

I would appreciate it if we could get the buildbot changes live first (as this takes a few days usually) and then merge this change.

A very small point in favour of this change, it would remove a ton of warnings from the buildbots. Since we get a lot of "option unused" when doing linking via. clang.

https://github.com/llvm/llvm-project/pull/156336