[cli] copy-source-files is obsolete

[bmuenzenmeyer]

remove it. core moves files

[raphaelokon]

Is it safe to remove or does it need more work?

[bmuenzenmeyer]

i've been using core's file copy's inside the gulp edition for some time now. it seems stable enough to start testing.

We need to audit other places where the CLI and Core still overlap

[stale]

It's hard to keep track of everything. This issue has been automatically marked as stale because it has not had recent activity, neither from the team nor the community. It will be closed if no further activity occurs. Please consider adding additional info, volunteering to contribute a fix for this issue, or making a further case that this is important to you, the team, and the project as a whole. Thanks!