Remove CCM::Element completely

[stdweird]

Was deprecated in #162, part of 17.3. The replacement function, is:

use EDG::WP4::CCM::Path 16.8.0 qw(unescape);

[stdweird]

@ned21 feel free to make a case why we should keep it longer 😄

[ned21]

The problem is that some sites have private components which need updating to the latest style/API. If the component is also scheduled for removal/replacement but that won't happen prior to 17.10 then it's hard to justify the work to modify the component but let's see where we are in October.

Our dependencies are:

• ncm-daemontools (to be decommissioned): EDG::WP4::CCM::Element qw(BOOLEAN)
• rootpw (needs update): EDG::WP4::CCM::Element qw(unescape);

[jrha]

Discussed at RAL workshop, will leave flagged for discussion until MS can update internal components.

[jouvin]

LAL workshop: no progress at MS, let open until next workshop to review progress...

[jrha]

Milestone removed until we can agree on removal.

[gombasg]

I think the issue is open for some time now, and we can handle the removal, so no objections.