ppx-type-conv is marked for autoremoval from testing

[Debian testing autoremoval watch]

ppx-type-conv 113.33.03-1 is marked for autoremoval from testing on 2017-04-02

It (build-)depends on packages with these RC bugs:
855930: latex-make: FTBFS: dh_auto_test: make -j1 check VERBOSE=1 returned exit 
code 2