Moved MapEntity saving methods to the shared project (the server needs to be able to save subs in the campaign mode)

Barotrauma/BarotraumaClient/Source/Map/Hull.cs

@@ -4,7 +4,6 @@ using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Graphics;
 using System;
 using System.Collections.Generic;
-using System.Xml.Linq;
 
 namespace Barotrauma
 {
@@ -323,27 +322,6 @@ namespace Barotrauma
 
                 x += width;
             }
-
-        }
-
-
-        public override XElement Save(XElement parentElement)
-        {
-            XElement element = new XElement("Hull");
-
-            element.Add
-            (
-                new XAttribute("ID", ID),
-                new XAttribute("rect",
-                    (int)(rect.X - Submarine.HiddenSubPosition.X) + "," +
-                    (int)(rect.Y - Submarine.HiddenSubPosition.Y) + "," +
-                    rect.Width + "," + rect.Height),
-                new XAttribute("water", volume)
-            );
-
-            parentElement.Add(element);
-
-            return element;
         }
     }
 }