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

[David Spickett via llvm-commits]

DavidSpickett wrote:

That was my first thought too but I suspect it's got some sort of staging branch in case of problems with main.

The bot is currently configuring stage 2 with:
```
cmake -G Ninja ../llvm/llvm -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_ASSERTIONS=True '-DLLVM_LIT_ARGS='"'"'-v'"'"'' -DCMAKE_INSTALL_PREFIX=../stage2.install '-DCMAKE_C_FLAGS='"'"'-mcpu=neoverse-512tvb -mllvm -scalable-vectorization=preferred -mllvm -treat-scalable-fixed-error-as-warning=false'"'"'' '-DCMAKE_CXX_FLAGS='"'"'-mcpu=neoverse-512tvb -mllvm -scalable-vectorization=preferred -mllvm -treat-scalable-fixed-error-as-warning=false'"'"'' -DLLVM_ENABLE_LLD=True -DMLIR_INCLUDE_INTEGRATION_TESTS=True -DMLIR_RUN_ARM_SVE_TESTS=True '-DLLVM_ENABLE_PROJECTS=flang;mlir;clang;clang-tools-extra;lld;llvm' '-DLLVM_ENABLE_RUNTIMES=compiler-rt;flang-rt' -DCMAKE_C_COMPILER=/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang -DCMAKE_CXX_COMPILER=/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang++
```
https://lab.llvm.org/buildbot/#/builders/41/builds/8602/steps/10/logs/stdio

Which includes the flag.

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