chore: remove obsolete documentation files from dash-spv

Remove temporary documentation files that were created during the
QRInfo implementation and code removal process. These files served
their purpose during development and are no longer needed.

- Removed QRINFO_COMPLETION_SUMMARY.md
- Removed QRINFO_FINAL_STATUS.md
- Removed QRINFO_IMPLEMENTATION_STATUS.md
- Removed QRINFO_INTEGRATION_COMPLETE.md
- Removed REMOVAL_EXECUTION_SUMMARY.md
- Removed REMOVAL_PLAN.md

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: 2 people