Remove unused ExpandedIcon and CollapsedIcon

src/main/java/the/bytecode/club/bytecodeviewer/resources/IconResources.java

@@ -143,54 +143,4 @@ public class IconResources
 
         return image;
     }
-    
-    
-    /**
-     * The minus sign button icon
-     */
-    public static class ExpandedIcon implements Icon, Serializable
-    {
-        static public Icon createExpandedIcon() {
-            return new ExpandedIcon();
-        }
-        
-        public void paintIcon(Component c, Graphics g, int x, int y)
-        {
-            Color backgroundColor = c.getBackground();
-            if(backgroundColor != null)
-                g.setColor(backgroundColor);
-            else
-                g.setColor(Color.white);
-            
-            g.fillRect(x, y, SIZE-1, SIZE-1);
-            g.setColor(Color.gray);
-            g.drawRect(x, y, SIZE-1, SIZE-1);
-            g.setColor(Color.black);
-            g.drawLine(x + 2, y + HALF_SIZE, x + (SIZE - 3), y + HALF_SIZE);
-        }
-        
-        public int getIconWidth() {
-            return SIZE;
-        }
-        
-        public int getIconHeight() {
-            return SIZE;
-        }
-    }
-    
-    /**
-     * The plus sign button icon
-     */
-    public static class CollapsedIcon extends ExpandedIcon
-    {
-        static public Icon createCollapsedIcon() {
-            return new CollapsedIcon();
-        }
-        
-        public void paintIcon(Component c, Graphics g, int x, int y)
-        {
-            super.paintIcon(c, g, x, y);
-            g.drawLine(x + HALF_SIZE, y + 2, x + HALF_SIZE, y + (SIZE - 3));
-        }
-    }
 }