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

[Debian testing autoremoval watch]

ruby-puppet-syntax 2.4.1-1 is marked for autoremoval from testing on 2018-02-21

It is affected by these RC bugs:
888165: ruby-puppet-syntax: FTBFS on ruby2.5: OpenSSL::ASN1::ASN1Error: oid exists