chore: drop accidentally committed local artifacts from BA-5650 stack

The cascading rebase pulled in stray files from a developer working
copy: tmp-vllm-model/, server.py, vllm.sh, model-definition.yaml,
docs/BA-5608-* and docs/model-deployment-zero-downtime.*, and the
scripts/ collection of one-off E2E scripts. None of these belong on
the release branch.

Removing them also unblocks ``pants tailor`` in CI, which had begun
suggesting BUILD additions for the orphan source tree.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jopemachine