Gun refactor (#8301)

Co-authored-by: Kara <lunarautomaton6@gmail.com>
Co-authored-by: T-Stalker <le0nel_1van@hotmail.com>
Co-authored-by: T-Stalker <43253663+DogZeroX@users.noreply.github.com>
Co-authored-by: ElectroJr <leonsfriedrich@gmail.com>
Co-authored-by: metalgearsloth <metalgearsloth@gmail.com>

Content.Client/Items/ItemStatusMessages.cs

@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using Robust.Client.UserInterface;
-using Robust.Shared.GameObjects;
+using Robust.Client.UserInterface;
 
 namespace Content.Client.Items
 {