remove unused deps

Emby.Server.Implementations/Data/SqliteExtensions.cs

@@ -4,7 +4,6 @@
 using System;
 using System.Collections.Generic;
 using System.Data;
-using System.Diagnostics;
 using System.Globalization;
 using Microsoft.Data.Sqlite;
 

Emby.Server.Implementations/Data/SqliteItemRepository.cs

@@ -3,7 +3,6 @@
 #pragma warning disable CS1591
 
 using System;
-using System.Buffers.Text;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Globalization;