Clean up all

Remvoe TextBoxXP

Source/GrasscutterTools/Game/Mail/MailItem.cs

@@ -14,8 +14,9 @@
  *
  *  You should have received a copy of the GNU Affero General Public License
  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
- * 
+ *
  **/
+
 namespace GrasscutterTools.Game.Mail
 {
     /// <summary>
@@ -53,4 +54,4 @@ namespace GrasscutterTools.Game.Mail
                 return $"{ItemId}:{name}";
         }
     }
-}
+}