refactor: remove unused shows_alerts? code

This is now an unused duplicate of logic that was moved into
`ScreensConfig.Screen.shows_alerts?`.

lib/screens/v2/screen_data/parameters.ex

@@ -38,9 +38,6 @@ defmodule Screens.V2.ScreenData.Parameters do
     triptych_v2: 0
   }
 
-  # This list should contain IDs of any apps that __do not__ show any widget that implements `Screens.V2.AlertsWidget`.
-  @apps_that_do_not_show_alerts [:triptych_v2]
-
   @spec get_candidate_generator(ScreensConfig.Screen.t() | atom()) :: candidate_generator()
   def get_candidate_generator(%ScreensConfig.Screen{app_id: app_id}) do
     get_candidate_generator(app_id)
@@ -68,18 +65,6 @@ defmodule Screens.V2.ScreenData.Parameters do
     Map.get(@app_id_to_audio_readout_interval, app_id)
   end
 
-  @doc """
-  Returns true for screen types that can show any widget that implements `Screens.V2.AlertsWidget`.
-  """
-  @spec shows_alerts?(ScreensConfig.Screen.t() | atom()) :: boolean()
-  def shows_alerts?(%ScreensConfig.Screen{app_id: app_id}) do
-    shows_alerts?(app_id)
-  end
-
-  def shows_alerts?(app_id) do
-    app_id not in @apps_that_do_not_show_alerts
-  end
-
   @spec get_audio_interval_offset_seconds(ScreensConfig.Screen.t()) :: pos_integer()
   def get_audio_interval_offset_seconds(%ScreensConfig.Screen{
         app_params: %ScreensConfig.V2.BusShelter{