dist/debian: drop unused code for old versioning scheme
dist/debian: drop unused code for old versioning scheme

Since development version specified as "666.development", this code won't called anymore, so drop it.

Signed-off-by: Takuya ASADA <4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>
Message-Id: <1497891211-26574-1-git-send-email-4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>

scylladb/scylla-jmx,scylladb/scylla-jmx,scylladb/scylla-jmx