Fix tasks

Author: vtm9

services/app/apps/codebattle/lib/codebattle/tournament/task_provider.ex

@@ -60,7 +60,7 @@ defmodule Codebattle.Tournament.TaskProvider do
     end
   end
 
-  def get_task(%{task_strategy: "sequential", current_round_position: round} = tournament, nil) do
+  def get_task(%{current_round_position: round} = tournament, nil) do
     tournament.task_ids
     |> Enum.at(round)
     |> case do
@@ -69,12 +69,6 @@ defmodule Codebattle.Tournament.TaskProvider do
     end
   end
 
-  def get_task(tournament, nil) do
-    tournament.task_ids
-    |> safe_random()
-    |> then(&Tasks.get_task(tournament, &1))
-  end
-
   def get_task(tournament, task_id) do
     Tasks.get_task(tournament, task_id)
   end