chore: remove unused argument (#987)

# What does this PR do?

very small fix I noticed some unused arguments, but this seems like the
easiest one to remove since its passed in explicitly.


## Before submitting

- [ ] This PR fixes a typo or improves the docs (you can dismiss the
other checks if that's the case).
- [ ] Ran pre-commit to handle lint / formatting issues.
- [ ] Read the [contributor
guideline](https://github.com/meta-llama/llama-stack/blob/main/CONTRIBUTING.md),
      Pull Request section?
- [ ] Updated relevant documentation.
- [ ] Wrote necessary unit or integration tests.

Signed-off-by: Charlie Doern <cdoern@redhat.com>

llama_stack/cli/stack/build.py

@@ -75,4 +75,4 @@ environment is active, you must specify a name.
         # can be fast to load and reduces dependencies
         from ._build import run_stack_build_command
 
-        return run_stack_build_command(self.parser, args)
+        return run_stack_build_command(args)