Remove outdated comment

lib/gitlab/content_security_policy/config_loader.rb

@@ -141,9 +141,6 @@ module Gitlab
       # Using 'self' in the CSP introduces several CSP bypass opportunities
       # for this reason we list the URLs where GitLab frames itself instead
       def self.allow_framed_gitlab_paths(directives)
-        # We need the version without trailing / for the sidekiq page itself
-        # and we also need the version with trailing / for "deeper" pages
-        # like /admin/sidekiq/busy
         ['/admin/', '/assets/', '/-/speedscope/index.html'].map do |path|
           append_to_directive(directives, 'frame_src', Gitlab::Utils.append_path(Gitlab.config.gitlab.url, path))
         end