As discussed previously in this list  and on phabricator , I've
just removed the Ubuntu Trusty image as a default option when creating
new VMs. This is part of a longterm foundation-wide process to
standardize on Debian as the distribution of choice.
Existing Trusty VMs are unaffected by this change, as are present
ToolForge workflows. WMCS operators still have the ability to create
Trusty VMs in a pinch, so if you need one please create a phabricator
task with an explanation of what you need and why and we'll create it as
soon as we're able.