[BUG] seq_v unusued, but set causing complaints in upstream PyTorch compilation

Describe the bug
A clear and concise description of what the bug is.
build trace:
https://hud.pytorch.org/pr/pytorch/pytorch/131493#32406967080

Steps/Code to reproduce bug
Follow this guide http://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports to craft a minimal bug report. This helps us reproduce the issue you're having and resolve the issue more quickly.

• try to compile @eqy's PR here https://github.com/pytorch/pytorch/pull/131493 . Compilation throws errors due to unused variables. [maybe_unused] or removing them could be used to fix them.

Expected behavior
A clear and concise description of what you expected to happen.

CUTLASS does not cause errors in downstream projects due to unused variables.

Environment details (please complete the following information):

• Environment location: [Bare-metal, Docker, Cloud(specify cloud provider)]

Additional context
Add any other context about the problem here.

Start with the linked PyTorch PR and its build trace to identify where the unused seq_v variable is introduced during CUTLASS compilation. Trace that variable to the relevant CUTLASS entry point, then confirm completion when the reported downstream compilation no longer emits unused-variable errors.