Remove redundant workflow files

- Removed claude-code.yml which has been replaced by the reusable claude-full.yml workflow
- Removed claude-issue-fix.yml which has been replaced by the claude-label-fix.yml reusable workflow
- Kept only the necessary workflow files: claude-full.yml, claude-label-fix.yml, and example-minimal.yml
- This simplifies the repository structure to match the new reusable workflow approach

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

Co-Authored-By: Claude <noreply@anthropic.com>

Author: paul-fracture