Removing sogo-connector from stretch-backports

[Carsten Schoenert <c.schoenert@t-online.de>]

Hi Backports team,

could you please remove the package sogo-connector version (and possible
earlier) 31.0.5-2~bpo9+1 from stretch-backports please?

We have a newer version 60.0.0+gite2547a3-1~deb9u1 in stretch since one
of the previous point releases due the incompatibility of all versions
less than 60.x in Thunderbird.

Thanks!

-- 
Regards
Carsten Schoenert