pd-flext is marked for autoremoval from testing

[Debian testing autoremoval watch]

pd-flext 0.6.0+git20161101.1.01318a94-4 is marked for autoremoval from testing 
on 2020-02-13

It (build-)depends on packages with these RC bugs:
947582: sndobj: FTBFS with scons 3.1.2-1