misc: chore: [ci skip] Remove unused 'using' directives from solution

src/Ryujinx/Utilities/PlayReport/Analyzer.cs

@@ -1,5 +1,4 @@
 using Gommon;
-using MsgPack;
 using Ryujinx.Ava.Utilities.AppLibrary;
 using System;
 using System.Collections.Generic;

src/Ryujinx/Utilities/PlayReport/MatchedValues.cs

@@ -1,7 +1,6 @@
 using MsgPack;
 using Ryujinx.Ava.Utilities.AppLibrary;
 using System.Collections.Generic;
-using System.Linq;
 
 namespace Ryujinx.Ava.Utilities.PlayReport
 {

src/Ryujinx/Utilities/PlayReport/PlayReports.cs

@@ -1,9 +1,4 @@
-using System;
-using System.Buffers.Binary;
-using System.Collections.Generic;
-using System.Linq;
-
-namespace Ryujinx.Ava.Utilities.PlayReport
+namespace Ryujinx.Ava.Utilities.PlayReport
 {
     public static partial class PlayReports
     {

src/Ryujinx/Utilities/PlayReport/Specs.cs

@@ -1,5 +1,4 @@
-using FluentAvalonia.Core;
-using MsgPack;
+using MsgPack;
 using Ryujinx.Ava.Utilities.AppLibrary;
 using System;
 using System.Collections.Generic;