trunk/494fde23edb78949ea1eb33aef939850e2818270: [BE] Delete dead files from .circleci/ (#175915)

The PyTorch development team has executed a significant cleanup of their repository's legacy continuous integration infrastructure, using Claude AI to identify obsolete files for removal. In pull request #175915, contributor ZainRizvi deleted dead configuration files from the .circleci/ directory that had been inactive since the project's migration from CircleCI to GitHub Actions in December 2023. The cleanup targeted multiple categories of technical debt including old validation scripts from 2020, obsolete NVIDIA driver update utilities, and Android snapshot publishing tools that lost their parent configuration files during the migration.

The AI-assisted verification confirmed these files had zero references across the entire PyTorch GitHub organization through org-wide code search. Notably, the cleanup preserved 5 active binary_*.sh scripts and windows-jni/ directory for separate handling in follow-up PRs. This maintenance operation demonstrates how AI tools like Claude are being integrated into real-world software development workflows beyond code generation, specifically for technical debt identification and repository hygiene. The approved PR reduces repository complexity and maintenance burden for the massively popular machine learning framework with 97.8k GitHub stars.