Fix formatting errors in migration files

Co-authored-by: kamilbaczek <[email protected]>

Author: Copilot

Chapter-2-modules-separation/Src/Contracts/Fitnet.Contracts.Infrastructure/Database/Migrations/20230601184153_MakeSignedAtColumnNullable.cs

@@ -1,7 +1,7 @@
 #nullable disable
 
 namespace EvolutionaryArchitecture.Fitnet.Contracts.Data.Database.Migrations;
-using System;
+
 using Microsoft.EntityFrameworkCore.Migrations;
 
 [ExcludeFromCodeCoverage]

Chapter-2-modules-separation/Src/Contracts/Fitnet.Contracts.Infrastructure/Database/Migrations/20230601184328_AddCustomerIdColumn.cs

@@ -1,7 +1,7 @@
 #nullable disable
 
 namespace EvolutionaryArchitecture.Fitnet.Contracts.Data.Database.Migrations;
-using System;
+
 using Microsoft.EntityFrameworkCore.Migrations;
 
 [ExcludeFromCodeCoverage]

Chapter-2-modules-separation/Src/Contracts/Fitnet.Contracts.Infrastructure/Database/Migrations/20230624171216_ContractsAddColumnsToSupportContractExpiration.cs

@@ -1,7 +1,7 @@
 #nullable disable
 
 namespace EvolutionaryArchitecture.Fitnet.Contracts.Data.Database.Migrations;
-using System;
+
 using Microsoft.EntityFrameworkCore.Migrations;
 
 [ExcludeFromCodeCoverage]

Chapter-2-modules-separation/Src/Offers/Fitnet.Offers.DataAccess/Database/Migrations/20230503180337_CreateOfferTable.cs

@@ -1,7 +1,7 @@
 #nullable disable
 
 namespace SuperSimpleArchitecture.Fitnet.Migrations.OffersPersistenceMigrations;
-using System;
+
 using System.Diagnostics.CodeAnalysis;
 using Microsoft.EntityFrameworkCore.Migrations;
 

Chapter-2-modules-separation/Src/Passes/Fitnet.Passes.DataAccess/Database/Migrations/20230503180338_CreatePassesTable.cs

@@ -1,7 +1,7 @@
 #nullable disable
 
 namespace EvolutionaryArchitecture.Fitnet.Passes.DataAccess.Database;
-using System;
+
 using Microsoft.EntityFrameworkCore.Migrations;
 
 [ExcludeFromCodeCoverage]