review(#1154): refactor, redirect, regex, stderr

Author: kennethrioja

lib/ingestors/concerns/github_ingestor_material_helpers.rb

@@ -21,7 +21,6 @@ def parse_xml_sitemap(url)
         urls = SitemapParser.new(
           url,
           recurse: true,
-          url_regex: /(github\.com|github\.io)/i,
           headers: { 'User-Agent' => config[:user_agent] }
         ).to_a.uniq.map(&:strip)