Bug#1122506: RM: bst-external -- ROM; only useful for buildstream 1

[Jeremy Bícha]

Package: ftp.debian.org
X-Debbugs-Cc: bst-external at packages.debian.org
User: ftp.debian.org at packages.debian.org
Usertags: remove
Control: affects -1 src:bst-external
Control: block -1 by 1122504

Please remove bst-external from Unstable. It is only useful for
buildstream 1. Buildstream 1 is being removed from Unstable and will
eventually be replaced by buildstream 2.

On behalf of the Debian GNOME team,
Jeremy Bicha