Auto merge of #23376 - eddyb:die-tydesc-die, r=nikomatsakis

Final remnant of reflection is gone. Also, virtual `Trait` destructors are no longer tied to `Box`.
That means they can be used to drop any instance of the type (used in libarena to replace TyDesc).

This is [breaking-change] for direct users of intrinsics:
* use `intrinsics::type_name::<T>()` instead of `(*intrinsics::get_tydesc::<T>()).name`
* the only way to get the destructor is from a trait object's vtable (see libarena changes)

r? @pcwalton f? @dotdash

0 files changed, 0 insertions, 0 deletions