Remove unused mix task

lib/mix/tasks/check_overuse.ex

@@ -1,36 +0,0 @@
-defmodule Mix.Tasks.CheckOveruse do
-  use Mix.Task
-  use Plausible.Repo
-  require Logger
-
-  # coveralls-ignore-start
-
-  def run(args) do
-    Application.ensure_all_started(:plausible)
-    Logger.configure(level: :error)
-    execute(args)
-  end
-
-  def execute(_args \\ []) do
-    active_users =
-      Repo.all(
-        from u in Plausible.Auth.User,
-          join: s in Plausible.Billing.Subscription,
-          on: s.user_id == u.id,
-          where: s.status == "active",
-          select: {u, s}
-      )
-
-    for {user, subscription} <- active_users do
-      IO.puts("Checking #{user.email}...")
-      usage = Plausible.Billing.usage(user)
-      allowance = Plausible.Billing.Plans.allowance(subscription)
-
-      if usage > allowance do
-        IO.puts("Overuse: #{user.email}")
-        IO.puts("Usage: #{usage}")
-        IO.puts("Allowance: #{allowance}")
-      end
-    end
-  end
-end