This reverts commit 0677271709.
#18790 was merged as one squash commit that carried two unrelated changes:
a process-incarnation fallback for reaping leaked orchestration worker
terminals, and an unannounced "Freebuff" third-party agent (catalog entry,
icon, locale strings, README rows). The Freebuff agent was never meant to
ship, so the whole PR is reverted; the reap fix should be re-submitted on
its own.
Until that re-land, a worker whose durable terminal handle goes stale is
again reported missing on release/stop instead of being re-found through
its process incarnation, so its terminal can leak on Remote Server.
The mobile session page closure pin moves 4218 -> 4219: the revert drops
the freebuff icon #22119 pinned (-1), and #22452 had already added two
src/shared modules without re-pinning (+2).