(4ff749939) Added new environment assets for implementation

Barotrauma/BarotraumaClient/Source/Screens/CreditsPlayer.cs

@@ -1,8 +1,5 @@
 using Microsoft.Xna.Framework;
-using Microsoft.Xna.Framework.Graphics;
 using System;
-using System.Collections.Generic;
-using System.Text;
 using System.Xml.Linq;
 
 namespace Barotrauma
@@ -11,7 +8,7 @@ namespace Barotrauma
     {
         private GUIListBox listBox;
 
-        private float scrollSpeed;
+        private readonly float scrollSpeed;
 
         public CreditsPlayer(RectTransform rectT, string configFile) : base(null, rectT)
         {