motd landscape link is shown twice

base-flles is shipping /etc/update-motd.d/10-help-text that prints these links:

printf " * Documentation: https://help.ubuntu.com\n"
printf " * Management: https://landscape.canonical.com\n"
printf " * Support: https://ubuntu.com/advantage\n"

There is no need for landscape-common's motd file to also print a link to landscape:

  Graph this data and manage this system at:
    https://landscape.canonical.com/

Full motd on a simple bionic container:
Welcome to Ubuntu Bionic Beaver (development branch) (GNU/Linux 4.13.0-36-generic x86_64)

 * Documentation: https://help.ubuntu.com
 * Management: https://landscape.canonical.com
 * Support: https://ubuntu.com/advantage

  System information as of Wed Mar 7 07:46:03 UTC 2018

  System load: 0.89 Processes: 25
  Usage of /home: unknown Users logged in: 0
  Memory usage: 1% IP address for eth0: 10.0.100.211
  Swap usage: 0%

  Graph this data and manage this system at:
    https://landscape.canonical.com/

  Get cloud support with Ubuntu Advantage Cloud Guest:
    http://www.ubuntu.com/business/services/cloud

0 packages can be updated.
0 updates are security updates.

Last login: Wed Mar 7 07:30:05 2018 from 10.0.100.1