DEV: Remove unused pkgr.io config files (#8514)

.pkgr.yml

@@ -1 +0,0 @@
-before_precompile: ./packaging/debian/setup.sh

packaging/debian/setup.sh

@@ -1,17 +0,0 @@
-#!/bin/sh
-# This script sets up the required config files before buildpack compilation.
-#
-# It also launches a postgresql server and a redis server, otherwise some rake
-# tasks can't be completed.
-
-set -e
-
-# Not everyone chooses to run discourse behind Apache or Nginx.
-cat >> config/environments/production.rb <<EOF
-Discourse::Application.configure do
-  config.serve_static_assets = true
-end
-EOF
-
-sudo service postgresql start
-sudo service redis-server start