Fixed block construction / Added build version to crash

core/src/io/anuke/mindustry/io/Saves.java

@@ -2,7 +2,6 @@ package io.anuke.mindustry.io;
 
 import com.badlogic.gdx.files.FileHandle;
 import com.badlogic.gdx.utils.Array;
-import com.badlogic.gdx.utils.async.AsyncExecutor;
 import io.anuke.mindustry.core.GameState.State;
 import io.anuke.mindustry.game.Difficulty;
 import io.anuke.mindustry.game.GameMode;
@@ -21,8 +20,6 @@ public class Saves {
     private boolean saving;
     private float time;
 
-    private AsyncExecutor exec = new AsyncExecutor(1);
-
     public void load(){
         saves.clear();
         for(int i = 0; i < saveSlots; i ++){