To remove the landscape.canonical.com line, create or edit (as root) the file /etc/landscape/client.conf.
In /etc/landscape/client.conf, add these lines:
[sysinfo]
exclude_sysinfo_plugins = LandscapeLink
This works for all default plugins:
Load, Disk, Memory, Temperature, Processes, LoggedInUsers, LandscapeLink, Network
So, to have your motd look more like this :
System load: 0.83 Swap usage: 0%
Usage of /: 59.5% of 117.38GB Users logged in: 3
Memory usage: 7% IP address for eth0: 10.10.30.70
...you would want to remove Temperature, LandscapeLink, Processes from the landscape-sysinfo process.
These can be added in the client.conf file as before, comma separated:
[sysinfo]
exclude_sysinfo_plugins = LandscapeLink,Temperature,Processes
This can be tested one the command line with:
landscape-sysinfo --exclude-sysinfo-plugins=Temperature,LandscapeLink,Processes
See landscape-sysinfo --help for some additional information.