[DRE-maint] ruby-rails-assets-perfect-scrollbar is marked for autoremoval from testing

[Debian testing autoremoval watch]

ruby-rails-assets-perfect-scrollbar 1.4.0-1 is marked for autoremoval from testing on 2019-04-08

It is affected by these RC bugs:
924174: ruby-rails-assets-perfect-scrollbar: broken symlink: /usr/share/ruby-rails-assets-perfect-scrollbar/app/assets/javascripts/perfect-scrollbar.js -> ../../../../javascript/utatti-perfect-scrollbar/dist/perfect-scrollbar.js