Remove unused namespaces

modules/feature-management/src/Volo.Abp.FeatureManagement.Application.Contracts/Volo/Abp/FeatureManagement/UpdateFeatureDto.cs

@@ -1,8 +1,4 @@
-using System;
+namespace Volo.Abp.FeatureManagement
-using System.Collections.Generic;
-using System.Text;
-
-namespace Volo.Abp.FeatureManagement
 {
     public class UpdateFeatureDto
     {

modules/feature-management/src/Volo.Abp.FeatureManagement.Application/Volo/Abp/FeatureManagement/FeatureAppService.cs

@@ -1,13 +1,9 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 using JetBrains.Annotations;
 using Microsoft.AspNetCore.Authorization;
-using Microsoft.Extensions.Localization;
 using Microsoft.Extensions.Options;
-using Volo.Abp.Application.Services;
 using Volo.Abp.Features;
 
 namespace Volo.Abp.FeatureManagement