[llvm] [SPIRV] convergence anchor intrinsic does not have a parent token (PR #122230)

[Sameer Sahasrabuddhe via llvm-commits]

ssahasra wrote:

I really don't understand what assert you are talking about. The code that I deleted tries to **return a token used by an anchor**, which cannot exist because a legal anchor should not have an operand bundle. I don't know how to be clearer than this. That code is wrong, and it should be removed.

https://github.com/llvm/llvm-project/pull/122230