Merge branch '330402-remove-unicorn-gitlab-pkgr_before_precompile' into 'master'

Remove Unicorn support: delete unused bin/pkgr_before_precompile.sh

See merge request gitlab-org/gitlab!62079

bin/pkgr_before_precompile.sh

-#!/bin/sh
-
-set -e
-
-for file in config/*.yml.example; do
-  cp ${file} config/$(basename ${file} .example)
-done
-
-# Allow to override the GitLab URL from an environment variable, as this will avoid having to change the configuration file for simple deployments.
-config=$(echo '<% gitlab_url = URI(ENV["GITLAB_URL"] || "http://localhost:80") %>' | cat - config/gitlab.yml)
-echo "$config" > config/gitlab.yml
-sed -i "s/host: localhost/host: <%= gitlab_url.host %>/" config/gitlab.yml
-sed -i "s/port: 80/port: <%= gitlab_url.port %>/" config/gitlab.yml
-sed -i "s/https: false/https: <%= gitlab_url.scheme == 'https' %>/" config/gitlab.yml
-
-# No need for config file. Will be taken care of by REDIS_URL env variable
-rm config/resque.yml
-
-# Set default unicorn.rb file
-echo "" > config/unicorn.rb