Bug#924013: unmotivated b-d on libubsan0 (GCC 7)

[Matthias Klose]

Source: ricochet-im
Version: 1.1.4-2
Severity: serious
Tags: sid buster
User: debian-...@lists.debian.org
Usertags: gcc-7-rm

ricochet-im build-depends on GCC 7 (libubsan0). Please just drop that bogus
build dependency.