Suppress warnings from fields never used or never assigned (CS0169 and CS0649) (#919)

* chore : disable unwanted warnings and minor code cleanup

* chore : remove more warnings

* fix : reorder struct correctly

* fix : restore _isKernel and remove useless comment

* fix : copy/paste error

* fix : restore CallMethod call

* fix : whitespace

* chore : clean using

* feat : remove warnings

* fix : simplify warning removal on struct

* fix : revert fields deletion and code clean up

* fix : re-add RE value

* fix : typo

Ryujinx.Debugger/Profiler/Profile.cs

@@ -11,7 +11,9 @@ namespace Ryujinx.Debugger.Profiler
         public static float UpdateRate    => _settings.UpdateRate;
         public static long  HistoryLength => _settings.History;
 
+#pragma warning disable CS0649
         private static InternalProfile  _profileInstance;
+#pragma warning restore CS0649
         private static ProfilerSettings _settings;
 
         [Conditional("USE_DEBUGGING")]

Ryujinx.Debugger/UI/DebuggerWidget.cs

@@ -9,7 +9,9 @@ namespace Ryujinx.Debugger.UI
         public event EventHandler DebuggerEnabled;
         public event EventHandler DebuggerDisabled;
 
+#pragma warning disable CS0649
         [GUI] Notebook _widgetNotebook;
+#pragma warning restore CS0649
 
         public DebuggerWidget() : this(new Builder("Ryujinx.Debugger.UI.DebuggerWidget.glade")) { }
 

Ryujinx.Debugger/UI/ProfilerWidget.cs

@@ -81,6 +81,7 @@ namespace Ryujinx.Debugger.UI
 
         private SkRenderer _renderer;
 
+#pragma warning disable CS0649
         [GUI] ScrolledWindow _scrollview;
         [GUI] CheckButton    _enableCheckbutton;
         [GUI] Scrollbar      _outputScrollbar;
@@ -90,6 +91,7 @@ namespace Ryujinx.Debugger.UI
         [GUI] CheckButton    _showInactive;
         [GUI] Button         _stepButton;
         [GUI] CheckButton    _pauseCheckbutton;
+#pragma warning restore CS0649
 
         public ProfilerWidget() : this(new Builder("Ryujinx.Debugger.UI.ProfilerWidget.glade")) { }
 
@@ -287,7 +289,7 @@ namespace Ryujinx.Debugger.UI
                                 _sortedProfileData = _sortedProfileData.Where((pair => filterRegex.IsMatch(pair.Key.Search))).ToList();
                             }
                         }
-                        catch (ArgumentException argException)
+                        catch (ArgumentException)
                         {
                             // Skip filtering for invalid regex
                         }