refactor(editor): cleanup dead code (#12281)

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

- **Refactor**
  - Streamlined and consolidated block and inline extension exports by removing multiple block-spec and inline extension arrays from public APIs.
  - Reduced exported constants, types, and utility functions related to various block and embed features.
  - Simplified the codebase by removing deprecated type guards, adapter extensions, and redundant extension groupings.
- **Chores**
  - Cleaned up internal APIs by deleting unused exports, imports, and outdated code, enhancing maintainability.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/blocks/bookmark/src/bookmark-spec.ts

@@ -1,24 +0,0 @@
-import { BookmarkBlockSchema } from '@blocksuite/affine-model';
-import { BlockViewExtension, FlavourExtension } from '@blocksuite/std';
-import type { ExtensionType } from '@blocksuite/store';
-import { literal } from 'lit/static-html.js';
-
-import { BookmarkBlockAdapterExtensions } from './adapters/extension';
-import { BookmarkBlockInteraction } from './bookmark-edgeless-block';
-import { BookmarkSlashMenuConfigExtension } from './configs/slash-menu';
-import { createBuiltinToolbarConfigExtension } from './configs/toolbar';
-
-const flavour = BookmarkBlockSchema.model.flavour;
-
-export const BookmarkBlockSpec: ExtensionType[] = [
-  FlavourExtension(flavour),
-  BlockViewExtension(flavour, model => {
-    return model.parent?.flavour === 'affine:surface'
-      ? literal`affine-edgeless-bookmark`
-      : literal`affine-bookmark`;
-  }),
-  BookmarkBlockInteraction,
-  BookmarkBlockAdapterExtensions,
-  createBuiltinToolbarConfigExtension(flavour),
-  BookmarkSlashMenuConfigExtension,
-].flat();

blocksuite/affine/blocks/bookmark/src/index.ts

@@ -1,6 +1,5 @@
 export * from './adapters';
 export * from './bookmark-block';
-export * from './bookmark-spec';
 export * from './commands';
 export * from './components';
 export { BookmarkSlashMenuConfigIdentifier } from './configs/slash-menu';