[pkg-horde] php-horde-sesha is marked for autoremoval from testing

[Debian testing autoremoval watch]

php-horde-sesha 1.0.0~rc3-1 is marked for autoremoval from testing on 2017-11-04

It (build-)depends on packages with these RC bugs:
876400: php-horde-image: CVE-2017-14650: remote code execution n _raw() via $index parameter