iOS fixes

core/src/io/anuke/mindustry/entities/effect/Decal.java

@@ -33,10 +33,5 @@ public abstract class Decal extends TimedEntity implements BelowLiquidTrait, Dra
         return groundEffectGroup;
     }
 
-    @Override
-    public float fin() {
-        return time / lifetime();
-    }
-
     abstract void drawDecal();
 }

core/src/io/anuke/mindustry/entities/effect/ItemTransfer.java

@@ -134,9 +134,4 @@ public class ItemTransfer extends TimedEntity implements DrawTrait{
     public EntityGroup targetGroup(){
         return effectGroup;
     }
-
-    @Override
-    public float fin(){
-        return time() / lifetime();
-    }
 }