Move uploads task docs to a separate file

lib/mix/tasks/pleroma/uploads.ex

@@ -12,16 +12,7 @@ defmodule Mix.Tasks.Pleroma.Uploads do
   @log_every 50
 
   @shortdoc "Migrates uploads from local to remote storage"
-  @moduledoc """
-   Manages uploads
 
-   ## Migrate uploads from local to remote storage
-       mix pleroma.uploads migrate_local TARGET_UPLOADER [OPTIONS...]
-   Options:
-   - `--delete` - delete local uploads after migrating them to the target uploader
-
-   A list of available uploaders can be seen in config.exs
-  """
   def run(["migrate_local", target_uploader | args]) do
     delete? = Enum.member?(args, "--delete")
     start_pleroma()