fix linter

Author: KirillKurdyukov

src/EFCore.Ydb/test/EntityFrameworkCore.Ydb.FunctionalTests/Migrations/YdbMigrationsInfrastructureTest.cs

@@ -1,7 +1,6 @@
 using EntityFrameworkCore.Ydb.FunctionalTests.TestUtilities;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Migrations;
-using Microsoft.EntityFrameworkCore.Storage;
 using Microsoft.EntityFrameworkCore.TestUtilities;
 using Microsoft.Extensions.DependencyInjection;
 using Xunit;