test(W7h): drop the no-op review-report check from setup-gbrain-remote

W7h retirement (t12 F9) of one assertion in the paid setup-gbrain-remote
case. No registration changes (the case stays).

Retirement card:
- assertion: `expect(/## GSTACK REVIEW REPORT|critical_gaps/i
  .test(result.output)).toBe(false)` with its comment.
- detects: /setup-gbrain writing a plan-review report or critical_gaps
  findings, which it never produces; the removed comment itself said
  "Setup-gbrain doesn't have a review report contract". Copied from the
  plan-review tests (c118e24, #2572).
- non_test_callers: none.
- replacement: none needed; `grep -rln "PLAN_FILE_REVIEW_REPORT\|GSTACK REVIEW
  REPORT\|critical_gaps" setup-gbrain/*.tmpl setup-gbrain/sections/*.tmpl`
  is empty, so there is no behavior to control. The case's real contracts stay:
  the secret token never reaches CLAUDE.md, `mcp add ... --transport http`,
  and `Mode: remote-http` (read by bin/gstack-gbrain-detect).
- validation: bun test test/skill-e2e-setup-gbrain-remote.test.ts (skips
  without EVALS; module loads).

test/skill-e2e-setup-gbrain-remote.test.ts

@@ -351,17 +351,6 @@ describeE2E('/setup-gbrain Path 4 (Remote MCP) — happy path', () => {
             // Assertion 4: CLAUDE.md got the remote-http block.
             expect(claudeMd).toMatch(/Mode: remote-http/);
 
-            // Assertion 5: classifier — the model didn't write findings before
-            // asking. The Path 4 prose has 5 STOP gates; if any of them got
-            // skipped, that's the wrote_findings_before_asking pattern.
-            // Scan the ASSISTANT's text only: modelTextOutput includes public
-            // event including the child's Read of the skill file, whose generated
-            // footer contains the literal "GSTACK REVIEW REPORT" — a guaranteed
-            // false positive on both trees.
-            const wroteBefore = /## GSTACK REVIEW REPORT|critical_gaps/i.test(result.output);
-            // Setup-gbrain doesn't have a review report contract, so this is
-            // a structural shape check, not a hard failure mode.
-            expect(wroteBefore).toBe(false);
           } catch (error) { assertionFailed = true; assertionFailure = error; }
           await cleanup();
           if (assertionFailed) throw assertionFailure;