chore(core): hide embedding status in chat (#13605)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Style**
* Simplified the AI chat composer tip: removed the dynamic
embedding-status tooltip so only a single static caution remains — “AI
outputs can be misleading or wrong.”
* **Tests**
* One end-to-end test related to embedding status was commented out and
is no longer executed.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/core/src/blocksuite/ai/components/ai-chat-composer/ai-chat-composer.ts

@@ -198,12 +198,6 @@ export class AIChatComposer extends SignalWatcher(
         <ai-chat-composer-tip
           .tips=${[
             html`<span>AI outputs can be misleading or wrong</span>`,
-            this.embeddingCompleted
-              ? null
-              : html`<ai-chat-embedding-status-tooltip
-                  .affineWorkspaceDialogService=${this
-                    .affineWorkspaceDialogService}
-                />`,
           ].filter(Boolean)}
           .loop=${false}
         ></ai-chat-composer-tip>