Update README.md (Removed references to NMS)

[mkingst]

Proposed changes

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Checklist

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• [ ] I have read the CONTRIBUTING document
• [ ] If applicable, I have added tests that prove my fix is effective or that my feature works
• [ ] If applicable, I have checked that any relevant tests pass after adding my changes
• [ ] I have updated any relevant documentation (README.md and CHANGELOG.md)