refactor(editor): cleanup dead code (#9300)

blocksuite/blocks/src/data-view-block/data-view-spec.ts

@@ -5,10 +5,7 @@ import {
 } from '@blocksuite/block-std';
 import { literal } from 'lit/static-html.js';
 
-import { DataViewBlockService } from './database-service.js';
-
 export const DataViewBlockSpec: ExtensionType[] = [
   FlavourExtension('affine:data-view'),
-  DataViewBlockService,
   BlockViewExtension('affine:data-view', literal`affine-data-view`),
 ];

blocksuite/blocks/src/data-view-block/database-service.ts

@@ -1,13 +0,0 @@
-import { BlockService } from '@blocksuite/block-std';
-import { DatabaseSelection } from '@blocksuite/data-view';
-
-import { DataViewBlockSchema } from './data-view-model.js';
-
-export class DataViewBlockService extends BlockService {
-  static override readonly flavour = DataViewBlockSchema.model.flavour;
-
-  override mounted(): void {
-    super.mounted();
-    this.selectionManager.register(DatabaseSelection);
-  }
-}