Remove unused variables

Author: Bilal44

jobs/Backend/Task/Program.cs

@@ -35,19 +35,18 @@ private static async Task GetExchangeRate(
             try
             {
                 var apiClient = serviceProvider.GetRequiredService<IApiClient<CnbRate>>();
-                var logger = serviceProvider.GetService<ILogger<ExchangeRateProvider>>();
-                var dateTimeSource = serviceProvider.GetService<IDateTimeSource>();
-                var exchangeRateCache = serviceProvider.GetService<IExchangeRateCacheService>();
+                var exchangeRateCache = serviceProvider.GetRequiredService<IExchangeRateCacheService>();
+                var logger = serviceProvider.GetRequiredService<ILogger<ExchangeRateProvider>>();
+                var dateTimeSource = serviceProvider.GetRequiredService<IDateTimeSource>();
 
                 var provider = new ExchangeRateProvider(
                     apiClient,
-                    exchangeRateCache!,
-                    dateTimeSource!,
-                    logger!);
+                    exchangeRateCache,
+                    logger);
 
                 var rates = await provider.GetExchangeRates(currencies);
 
-                Console.WriteLine($"Successfully retrieved {rates.Count} exchange rates at {dateTimeSource?.UtcNow} UTC:");
+                Console.WriteLine($"Successfully retrieved {rates.Count} exchange rates at {dateTimeSource.UtcNow} UTC:");
                 foreach (var rate in rates)
                 {
                     Console.WriteLine(rate.ToString());

jobs/Backend/Task/Services/ExchangeRateProvider.cs

@@ -1,5 +1,4 @@
-using ExchangeRateUpdater.Common;
-using ExchangeRateUpdater.Services.Interfaces;
+using ExchangeRateUpdater.Services.Interfaces;
 using ExchangeRateUpdater.Services.Models;
 using ExchangeRateUpdater.Services.Models.External;
 using Microsoft.Extensions.Logging;
@@ -9,7 +8,6 @@ namespace ExchangeRateUpdater.Services
     public class ExchangeRateProvider(
             IApiClient<CnbRate> apiClient,
             IExchangeRateCacheService cacheService,
-            IDateTimeSource dateTimeSource,
             ILogger<ExchangeRateProvider> logger)
     {
         private const string TargetCurrencyCode = "CZK";

jobs/Backend/Task/Services/Interfaces/IExchangeRateCacheService.cs

@@ -1,6 +1,4 @@
 using ExchangeRateUpdater.Services.Models;
-using System.Collections.Generic;
-
 namespace ExchangeRateUpdater.Services.Interfaces
 {
     public interface IExchangeRateCacheService