clay: clean up migration error case printfs
::
++ install-from-tmp
|= =desk
- ~? =([~ ~] ank.dom) [%oh-no-double-empty syd]
- ~? !(~(has by dir.ank.dom) ~.tmp) [%oh-no-no-tmp syd]
%- emil
:~ :^ hen %pass /dist/[desk]/create
%^ new-desk:cloy desk
++ get-tmp-jam
|= =desk
^- @
- ~| [%tmp desk]
+ ~| [%missing-tmp-desk-jam desk]
?~ tmp=(~(get by dir.ank.dom) ~.tmp) !!
?~ new=(~(get by dir.u.tmp) desk) !!
?~ jam=(~(get by dir.u.new) ~.jam) !!
