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

[Debian testing autoremoval watch]

ruby-remotipart 1.2.1-2 is marked for autoremoval from testing on 2017-09-02

It (build-)depends on packages with these RC bugs:
869050: ruby-jquery-rails: FTBFS: ERROR: Test "ruby2.3" failed: Invalid gemspec in [jquery-rails.gemspec]: No such file or directory - git