Revert "Fixed ZPM spawn on Fields with Boxes"

This reverts commit 7cbb201451.

cicaprojekt/Field.java

@@ -25,7 +25,6 @@ public class Field extends cicaprojekt.Tile {
 
     @Override
     public boolean canHazZPM() {
-        if(boxStack.size() > 0) return false;
-        else return true;
+        return true;
     }
 }