Remove unnecessary packages

src/Dodge/Room.hs

@@ -6,7 +6,7 @@ module Dodge.Room (
     module Dodge.Room.RoadBlock,
     module Dodge.Room.LasTurret,
     module Dodge.Room.Foreground,
-    module Dodge.LevelGen.Data,
+    module Dodge.LevelGen.PlacementHelper,
     module Dodge.Room.Procedural,
     module Dodge.Room.Corridor,
     module Dodge.Room.Link,
@@ -28,7 +28,7 @@ module Dodge.Room (
     module Dodge.Room.Pillar,
 ) where
 
-import Dodge.LevelGen.Data
+import Dodge.LevelGen.PlacementHelper
 import Dodge.Room.Airlock
 import Dodge.Room.BlinkAcross
 import Dodge.Room.Boss