Remove empty module

lib/kafkaex_lag_exporter.ex

@@ -1,13 +0,0 @@
-defmodule KafkaexLagExporter do
-  @moduledoc """
-  KafkaexLagExporter keeps the contexts that define your domain
-  and business logic.
-
-  Contexts are also responsible for managing your data, regardless
-  if it comes from the database, an external API or others.
-  """
-
-  def hello() do
-    :world
-  end
-end