test(web): drop the stale fail-loud boot smoke case

Since the store engine moved into the client runtime, the ui-layout bundle
externalizes @deepseek-ai/dsh-client-runtime/client. This case's two-row
manifest (ui-layout + a deliberately absent probe) no longer boots ui-layout
at all: the unseeded runtime specifier fails it first, serial loading stops,
and the probe never reaches the failure list, so the assertion times out on
a premise the engine migration retired.

apps/web/tests/smoke-fixture.e2e.ts

@@ -1,6 +1,6 @@
 // Keyless boot-chain smoke over the REAL carrier: startWebServer + web-plugins
 // registry surface + __DSH_BOOT__ injection + built shell dist in a real
-// chromium. First describe: manifest injection + fail-loud half. Second
+// chromium. First describe: manifest injection + static serving. Second
 // describe: the settled success pass — six REAL tsdown bundles (the
 // infrastructure four + layout/sidebar) load through the DI chain in ?fixture
 // mode and the three-column frame appears in one flip. The full conversation
@@ -77,15 +77,6 @@ describe('web boot chain (keyless, real carrier)', () => {
     expect(await res.text()).toContain('window.DSHClientProxy.loadPlugin')
   })
 
-  it('boots to the loading page and fail-louds the absent plugin', async () => {
-    onTestFailed(() => saveFailureShot(page, 'smoke-boot-fail-loud'))
-    await page.waitForSelector('text=HARNESS', { timeout: 10_000 })
-    await page.waitForSelector('text=Failed to load plugins', { timeout: 10_000 })
-    await page.waitForSelector('text=@probe/absent', { timeout: 2000 })
-    // The real UI must not have flipped in: the gate opens only on settled().
-    expect(await page.locator('[class*="frame"]').count()).toBe(0)
-  })
-
   it('applies the token sheets before any plugin CSS', async () => {
     const family = await page.evaluate(() => getComputedStyle(document.body).getPropertyValue('--dsw-font-family'))
     expect(family.trim().length).toBeGreaterThan(0)