v0.9.4: removed superfluous INSTANCE tracking in WndUseItem

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/windows/WndUseItem.java

@@ -30,9 +30,6 @@ import java.util.ArrayList;
 
 public class WndUseItem extends WndInfoItem {
 
-	//only one wnduseitem can appear at a time
-	private static WndUseItem INSTANCE;
-
 	private static final float BUTTON_HEIGHT	= 16;
 	
 	private static final float GAP	= 2;
@@ -41,11 +38,6 @@ public class WndUseItem extends WndInfoItem {
 		
 		super(item);
 
-		if( INSTANCE != null ){
-			INSTANCE.hide();
-		}
-		INSTANCE = this;
-	
 		float y = height + GAP;
 		
 		if (Dungeon.hero.isAlive()) {