Revert "docs: ship-policy names the review key and the receipt's review_depth fields (Step 14.5 audit ship1-docs-c1)"

This reverts commit 8497f51c00.

docs/ship-policy.md

@@ -59,7 +59,6 @@ refuses the file (`POLICY_GSTACK_TOO_OLD`). `validate` ends with
 | `full_e2e` | `true` \| `false` | `false` | `true`: every merge needs a passing full-gate result bound to a tree equal to the merging one modulo stamps; `gstack-ship-queue ready`, `stamp` and `verify` refuse without one (`QUEUE_GATE_MISSING`): a gate-ahead record, or the lane's `--gate-exit 0 --gate-log <file>` from its run on the gated head. Needs `min_gstack_version`. |
 | `review_scope` | `frozen` \| `diff-plus-blocking` \| `all` | `frozen` | The finding scope of `/ship`'s review loop; see [review_scope](#review-scope). `frozen` fixes the diff on pass 1, files blocking findings in unchanged code as issues, and later passes read only the range since the previous pass. `diff-plus-blocking` is the same but fixes a blocking finding in unchanged code in this PR instead of filing it. `all` is the earlier loop: every finding is fixed on every pass. Needs `min_gstack_version` when not `frozen`. |
 | `review_exclude_paths` | git glob pathspecs | `[]` | Content files (data, docs, binary, `.log`) `/ship`'s reviewers leave out; read from the base only, with code, gate, config, executable and named-by-code files kept. See [review_exclude_paths](#review-exclude-paths). Needs `min_gstack_version`. |
-| `review` | `{ panel?, reader_model?, platform?, risk_paths? }` | `{ all, lane, off, [] }` | Who does `/ship`'s review, read from the base only; see [Who reads](review-policy.md#who-reads-r65-the-base-policys-review-key). `panel`: `all` (today's panel on every class) \| `risk` \| `off` (the opt-in one-reader shapes); `reader_model`: `lane`, `cross-family` or a model id; `platform`: `off` \| `on` (a docs or tests diff with no numeric, results or prereg claims whose PR carries capy-ai[bot]'s review at the exact head skips the readers); `risk_paths`: globs of code paths that count as risk class `policy`. Introduced at 1.95.0.0; needs `min_gstack_version` when set to a non-default value. |
 | `min_gstack_version` | version or `null` | `null` | The oldest gstack that may read the file; see the compatibility rule above. |
 | `docs` | `{ caps: [{ path, max_bytes }] }` or `null` | `null` | Documentation files with a byte cap. `/ship` Step 14.5 runs `gstack-ship-receipt docs-caps --base <base>` (the caps come from `origin/<base>`'s policy, never the branch's copy; `--policy <file>` is for a repository bootstrapping its policy) before the verification gate and prints one `DOCS_CAP: <path> <bytes>/<max> ok\|over` line per cap; any `over` (an absent file counts) exits 1 and blocks the ship until the file is trimmed or the cap raised on the base branch (`DOCS_AUDIT_BLOCKED`). At most 64 caps, each path contained. See [the ship receipt](#ship-receipt). Needs `min_gstack_version`. |
 | `train` | `{ gate_workflow, free_workflow, full_gate_check, record_artifact, max_size, fill_hours, screen_selection, trial_reservation_usd, land? }`, `{ gates, land, max_size, fill_hours }` or `null` | `null` | Turns on [merge trains](#run-a-merge-train), read from the base revision only. Every field is required and an unknown field is `POLICY_INVALID`: `max_size` 1 to 6, `fill_hours` above 0 and at most 24, `screen_selection` `gstack-paid` \| `none`, `trial_reservation_usd` above 0 and at most 100. A block with `gates` ([any repository](#train-gates)) takes `max_size` 1 to 5 and needs `min_gstack_version` at least `TRAIN_GATES_KEY_VERSION`. `null` keeps the per-PR queue exactly as it is. Needs `min_gstack_version`. |
@@ -1188,8 +1187,7 @@ repair is trimming the file, never raising the cap in the same PR.
 **`review_depth` and `gstack_version`.** `write` records the gstack that
 wrote the receipt and the review depth at the checked-out head
 ([review-policy.md#review-depth](review-policy.md#review-depth)):
-`{ depth, class, runtime_lines, rules, base, registry, gate_scan: { tagged, head }, reasons, risk, mode }`
-(`mode` is lean, panel or platform; `declared` and `detected` appear with `write --declare-risk`, and the platform depth adds `platform_review`, see [review-policy.md](review-policy.md#review-depth)),
+`{ depth, class, runtime_lines, rules, base, registry, gate_scan: { tagged, head }, reasons }`,
 computed from git objects for the range against `origin/<base>`
 (`gstack-diff-scope <base> --head <sha>` for the scope signals), with the gate
 scan run on that head. `--head` must be the checked-out HEAD