[DRE-maint] ruby-ref is marked for autoremoval from testing

[Debian testing autoremoval watch]

ruby-ref 1.0.2+dfsg-1 is marked for autoremoval from testing on 2014-05-26

It is affected by these RC bugs:
746146: ruby-ref: FTBFS: Test "ruby2.1" failed: no implicit conversion from nil to integer (TypeError)