Remove unused namespaces

docs/en/tutorials/modular-crm/part-03.md

@@ -441,7 +441,6 @@ Here, you simply use the `IProductAppService` to get a list of all products and
 @page
 @using Microsoft.Extensions.Localization
 @using ModularCrm.Catalog.Localization
-@using ModularCrm.Catalog.UI.Pages.Catalog
 @model ModularCrm.Catalog.UI.Pages.Catalog.IndexModel
 @inject IStringLocalizer<CatalogResource> L
 

docs/en/tutorials/modular-crm/part-06.md

@@ -90,7 +90,6 @@ Open the `ProductIntegrationService.cs` file and replace its content with the fo
 using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
-using Volo.Abp;
 using Volo.Abp.Domain.Repositories;
 
 namespace ModularCrm.Catalog.Integration;