[llvm] [RISCV] Remove unnecessary dependencies on vtype register. (PR #146971)

[Philip Reames via llvm-commits]

preames wrote:

> Note that this is not 100% functionally correct,

This seems like a rather major problem.  Why should we spend review time on something which is known not to be correct?  Is there an purpose to having the off-by-default option?

https://github.com/llvm/llvm-project/pull/146971