remove all unused imports

SurveyBackend/SurveyBackend.API/Controllers/SurveyController.cs

@@ -1,11 +1,8 @@
-using System.Security.Claims;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using SurveyBackend.Core.Contexts;
 using SurveyBackend.DTOs.Survey;
 using SurveyBackend.Mappers;
-using SurveyBackend.Services.Exceptions;
-using SurveyLib.Core.Models;
 using SurveyLib.Core.Services;
 
 namespace SurveyBackend.Controllers;