feat: simplify instance loading in PackageExporterSetting

Author: IShix-g

Assets/Plugins/PackageExporter/Editor/PackageExporterSetting.cs

@@ -18,16 +18,13 @@ public static PackageExporterSetting Instance
             {
                 if (s_instance == default)
                 {
-                    s_instance = Load();
+                    s_instance = AssetDatabaseSupport.CreateOrLoad<PackageExporterSetting>(AssetPath);
                 }
                 return s_instance;
             }
         }
         static PackageExporterSetting s_instance;
 
-        public static PackageExporterSetting Load()
-            => AssetDatabaseSupport.CreateOrLoad<PackageExporterSetting>(AssetPath);
-
         public void SetFolderPath(string path)
         {
             _folderPath = path;