[DRE-maint] ruby-devise-two-factor is marked for autoremoval from testing

[Debian testing autoremoval watch]

ruby-devise-two-factor 3.0.3-1 is marked for autoremoval from testing on 2019-02-18

It (build-)depends on packages with these RC bugs:
918389: ruby-attr-encrypted: ruby-attr-encrypted FTBFS with rails 5.2.0