refactor: use default pairPeriod

ApiDto/Requests/Configuration/ScheduleConfigurationRequest.cs

@@ -1,6 +1,4 @@
-using Mirea.Api.Dto.Common;
-using System;
-using System.Collections.Generic;
+using System;
 using System.ComponentModel.DataAnnotations;
 
 namespace Mirea.Api.Dto.Requests.Configuration;
@@ -20,10 +18,4 @@ public class ScheduleConfigurationRequest
     /// </summary>
     [Required]
     public DateOnly StartTerm { get; set; }
-
-    /// <summary>
-    /// Gets or sets the pair period times, keyed by pair number.
-    /// </summary>
-    [Required]
-    public required IDictionary<int, PairPeriodTime> PairPeriod { get; set; }
 }