[clang] [compiler-rt] [llvm] [FMV] Remove useless features according the latest ACLE spec. (PR #88965)

[Alexandros Lamprineas via llvm-commits]

labrinea wrote:

In a follow up patch I will be sorting out inconsistencies in TargetParser regarding:
* features without corresponding ArchExtKind
* features without (Neg)Feature string
* features with incorrect DependentFeatures string

https://github.com/llvm/llvm-project/pull/88965