ros-pcl-conversions is marked for autoremoval from testing

[Debian testing autoremoval watch]

ros-pcl-conversions 0.2.1-6 is marked for autoremoval from testing on 2020-01-13

It (build-)depends on packages with these RC bugs:
945878: openni2: libopenni2: uses too much TLS memory on arm64 and ppc64el