Added all block hardness

src/pocketmine/block/WoodStairs.php

@@ -35,27 +35,13 @@ class WoodStairs extends Stair{
 		return "Wood Stairs";
 	}
 
-	public function getBreakTime(Item $item){
-
-		switch($item->isAxe()){
-			case 5:
-				return 0.4;
-			case 4:
-				return 0.5;
-			case 3:
-				return 0.75;
-			case 2:
-				return 0.25;
-			case 1:
-				return 1.5;
-			default:
-				return 3;
-		}
-	}
-
 	public function getDrops(Item $item){
 		return [
 			[$this->id, 0, 1],
 		];
 	}
+
+	public function getHardness(){
+		return 2;
+	}
 }