Remove unnecessary status_update definition

lib/pleroma/web/twitter_api/twitter_api_controller.ex

@@ -12,10 +12,6 @@ defmodule Pleroma.Web.TwitterAPI.Controller do
     |> json_reply(200, response)
   end
 
-  def status_update(conn, %{"status" => ""} = _status_data) do
-    empty_status_reply(conn)
-  end
-
   def status_update(%{assigns: %{user: user}} = conn, %{"status" => status_text} = status_data) do
     if status_text |> String.trim |> String.length != 0 do
       media_ids = extract_media_ids(status_data)