installation-guide is marked for autoremoval from testing

[Debian testing autoremoval watch]

installation-guide 20191229+rebuild1 is marked for autoremoval from testing on 
2020-07-20

It is affected by these RC bugs:
963450: installation-guide: FTBFS: 
/usr/share/texlive/texmf-dist/tex/xelatex/xecjk/xeCJK.sty: File `ctexhook.sty' 
not found.