Removed unused using statements

src/Indexer/Models/Worker.cs

@@ -1,4 +1,3 @@
-using System.Diagnostics;
 using Microsoft.Extensions.Diagnostics.HealthChecks;
 using Indexer.Exceptions;
 

src/Indexer/Models/WorkerResults.cs

@@ -1,5 +1,4 @@
 using System.Text.Json.Serialization;
-using Microsoft.Extensions.Diagnostics.HealthChecks;
 
 namespace Indexer.Models;
 

src/Indexer/Services/IndexerService.cs

@@ -1,6 +1,4 @@
-using Indexer.Exceptions;
 using Indexer.Models;
-using ElmahCore;
 
 namespace Indexer.Services;