fix: remove sensors from layout on room deletion

lib/localiser/domain/rooms.ex

@@ -4,6 +4,7 @@ defmodule Localiser.Domain.Rooms do
   alias Localiser.Repo
   alias Localiser.Domain.Schema.Room
   alias Localiser.Domain.Schema.Sensor
+  alias Localiser.Domain.Sensors
 
   def list_rooms do
     Repo.all(Room)
@@ -44,12 +45,12 @@ defmodule Localiser.Domain.Rooms do
   def delete_room(%Room{} = room) do
     sensors = Repo.all(from s in Sensor, where: s.room_id == ^room.id)
 
+    Enum.each(sensors, fn s ->
+      Sensors.remove_from_layout(s)
+    end)
+
     case Repo.delete(room) do
       {:ok, deleted} ->
-        Enum.each(sensors, fn s ->
-          Phoenix.PubSub.broadcast(Localiser.PubSub, "sensors", {:sensor_unenrolled, s.sensor_id})
-        end)
-
         Phoenix.PubSub.broadcast(Localiser.PubSub, "rooms", {:room_deleted, deleted.id, deleted.floor_id})
         {:ok, deleted}