去掉考场默认empty

app/Admin/Controllers/Recruit/RecruitController.php

@@ -2827,7 +2827,7 @@ class RecruitController extends Controller
                 $data[$place] = [];
             }
 
-            $room = $v->ex_room == null ? 'empty' : $v->ex_room;
+            $room = $v->ex_room == null ? '' : $v->ex_room;
             if(!array_key_exists($room,$data[$place])){
                 $data[$place][$room] = [];
             }