Fix current_user/uniq inconsistencies in admin#index, remove dead query

@mynodes used the bare @current_user ivar instead of the current_user
method (works today only because login_required already forces that
memoization; every other query and controller in this app uses the
method), and .uniq, which is plain Enumerable#uniq here, not
Relation#distinct -- it materializes every joined row into an Array
before deduplicating, rather than deduplicating in SQL.

@mypages had the same ivar pattern, no .order/.limit unlike every
sibling query in this action, and -- confirmed via a full grep -- is
referenced nowhere else in the codebase. Removed rather than bounded;
nothing was ever rendering it.

0 files changed, 0 insertions, 0 deletions