refactor: remove unused parse_repo_name and its Dict import

[ebios-star]

Summary

parse_repo_name was the legacy GraphQL-response parser that wrapped repo_data['owner']['login'] + '/' + repo_data['name'] into a lowercased 'owner/repo' string. The legacy scoring pipeline that called it was stripped in #1202, and the mirror path uses MirrorPullRequest.repo_full_name directly (already lowercased at parse time in MirrorPullRequest.from_dict).

grep -rn parse_repo_name --include='*.py' . across gittensor/, neurons/, and tests/ returns only the definition line — no remaining call sites.

Dropping the function also frees the only consumer of from typing import Dict in this module, so the import goes with it.

Net: -6 lines, single file. Matches the dead-code-removal precedent from #437, #448, #466.

Type of Change

• Bug fix
• New feature
• Refactor
• Documentation
• Other

Testing

• pytest tests/ — all 725 tests pass.

Checklist

• Code follows project style guidelines
• Self-review completed
• Changes are documented (if applicable)

[ebios-star]

@anderdc whenever you have a moment, this is a small dead-code cleanup — parse_repo_name has no remaining call sites after the legacy strip in #1202. Happy to revise scope if you'd prefer. Thanks!