[Debian-med-packaging] drop-seq is marked for autoremoval from testing

[Debian testing autoremoval watch]

drop-seq 2.3.0+dfsg-2 is marked for autoremoval from testing on 2020-07-11

It (build-)depends on packages with these RC bugs:
961700: picard-tools: picard-tools build depends on the removed libguava-java-doc