v0.3.1d: removed an uncesessary sprite erase on pitfall traps

src/com/shatteredpixel/shatteredpixeldungeon/levels/traps/PitfallTrap.java

@@ -81,7 +81,7 @@ public class PitfallTrap extends Trap {
 			}
 
 			sprite.parent.add(new WindParticle.Wind(pos));
-			sprite.killAndErase();
+			sprite.kill();
 			GameScene.updateMap( pos );
 		}
 	}