A1: delete one-shot scripts, the fix_tool crate, and unused workspace deps

[cunninghamcard-bit]

Part of #166 (track A, item A1). Refines the RFC-0033 A1 row after auditing every file in scripts/ for references (CI, docs, other scripts, source comments), inputs that still exist, and whether it is runnable at all.

Delete: one-shot migration scripts that already ran

Script	Evidence it is dead
fix_profiles.rs, fix_profiles2..5.rs	Header says cargo run -p fix-profiles; no such package exists. The edit they made (with_profile(...) on the thin wrappers, 36 files) is already in the tree.
check_missing.py, list_wrong_providers.py, revert_wrong_inventory.py, update_inventory_status.py	Flip ✅/❌ cells in rfc/0004-provider-inventory.md for the provider-generation session. No references anywhere.
migrate_openai_compatible_test.py, migrate_openai_compatible_standalone.py	Migrate openai_compatible_test.rs off the retired Shell types; the file now has zero Shell occurrences.
gen_provider_registry.py	Reads aimux-providers/src/openai_compat_registry.rs, which no longer exists. provider.rs still points to it in a doc comment and a panic message; fix both.
gen_responses_convert.py	Its own docstring says responses_convert.rs is hand-maintained now and the script refuses to run.
generate_all_providers.py, update_lib_rs.py, gen_vertex_maas_providers.py	Scaffolded the 33 thin wrappers and 10 vertex_ai_*_models.rs files once. Outputs carry no "generated, do not edit" marker and have been hand-edited since; re-running would overwrite them. B2 turns these files into registry rows anyway.
scripts/fix_tool/	A Hello, world! crate that is a workspace member, so every workspace build compiles it.
root [workspace.dependencies] schemars, proc-macro2, syn, quote	Declared at the workspace level, consumed by no crate.

scripts/__pycache__/ is untracked noise; add a root __pycache__/ ignore (only the Python binding's path is ignored today).

Keep, with a note on when each retires

Script	Why it stays
generate_thin_wrapper_cassettes.py	conformance_test.rs documents it as the provenance of every thin-wrapper cassette; needed when adding a wrapper until B2 lands. The RFC-0033 row listed it for deletion, which was wrong.
convert_cassettes.py, convert_pydantic_ai.py	Importers for rig / pydantic-ai cassettes; the cassettes are repository assets and these record how they were derived.
extract_litellm_bases.py, scan_litellm_urls.py	Research tools over a reference/litellm checkout (gitignored); the LiteLLM survey feeds B9.
responses_similarity_audit.py	RFC-0012 audit still cited by the RFC-0032 draft; retire after B6.

Live tooling (build-ios-xcframework.sh, gen_ts_types.py, gen_provider_names.py, gen_providers_doc.py, sync-version.sh, local-ci*.sh, install-*.sh) is untouched. gen_provider_names.py goes with A2.

Acceptance

• cargo metadata and the existing CI matrix pass unchanged; nothing in CI referenced a deleted file.
• docs/internal/handoff/HANDOFF_V2.md keeps its historical mentions (it is a dated handoff record).
• RFC-0033 A1 row updated to this list.

[cunninghamcard-bit]

Scope confirmed. What replaces the deleted generators (RFC-0033 §4.1): provider_registry.json stays the hand-maintained source of truth; generators may exist only with a do-not-edit header and a CI --check; upstream drift is caught by a weekly models.dev diff report and a monthly reachability probe instead of regeneration; and a contributing doc covers the three ways a provider is added. Follow-ups opened as separate issues (registry sync/probe, one-off triage of 27 URL disagreements + 116 missing providers, gen_providers_doc.py --check, adding-a-provider doc, auth level 1 and 2). PR #169 reopened.