Remove evals_per_branch.json

[Copilot]

Removed evals_per_branch.json file that was added as part of the post-processing removal PR but is no longer needed.

Checklist for the toolset:

• Toolset has unit tests where relevant
• Toolset has both ask_holmes and investigate evals
• Toolset has a documentation
• Toolset has the correct is_default flag
• Toolset returns a correct get_example_config
• Toolset does a live health check in addition to checking for correct configuration
• Create a demo video (if relevant)

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💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

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