Remove mise.toml file (#102)

## Summary:
The global mise config has Node set to 24.13 so the repo-specific mise.toml is no longer needed.

Issue: FEI-7566

## Test plan:
- node -v, see 24.13.1

Author: kevinb-khan

Reviewers: jeresig, somewhatabstract

Required Reviewers:

Approved By: jeresig

Checks: ✅ 4 checks were successful

Pull Request URL: #102

Author: kevinb-khan