quest(test): abandon the unreproduced export exit flake

quest/m1/test-flakes-2/README.md

@@ -42,7 +42,6 @@ Public API: none. Wire: none.
 - [Auth refresh mocks time](/quest/m1/test-flakes-2/auth-refresh-mock-time.md) - moq-relay's auth refresh and fixed-lease tests measure a grant's life on one mocked clock
 - [uring teardown close](/quest/m1/test-flakes-2/uring-teardown-close.md) - moq-uring's published-close teardown test holds under load, fixed at its cause
 - [Auth serve signals](/quest/m1/test-flakes-2/auth-serve-signals.md) - moq-cli's auth serve signal tests hold under load
-- [Export exit tests](/quest/m1/test-flakes-2/export-failure-exit.md) - moq-cli's failed-export and interrupted-publisher exit tests hold under load
 - [js -> go rewind](/quest/m1/test-flakes-2/js-go-rewind.md) - the `js -> go` interop cell never reads a frame below the previous group's start, fixed on the side that produced it
 - [WASM IETF read](/quest/m1/test-flakes-2/wasm-ietf-read.md) - the WASM suite's IETF read case reads whole groups on a loaded runner, fixed at the burst or the assertion as the evidence says
 - [BBR marking seed](/quest/m1/test-flakes-2/bbr-marking-seed.md) - the BBR marking test seeds its probe schedule, replays a failing seed, and its rare drop is fixed at the cause

quest/m1/test-flakes-2/auth-serve-signals.md

@@ -8,9 +8,8 @@ their cause. They still prove that a signal exits `auth serve` cleanly.
 
 ## Plan
 
-Seen 2026-10-13 on #5458 and #5481 at load averages near 47 on 24 cores,
-beside [export failure exit](/quest/m1/test-flakes-2/export-failure-exit.md):
-each timed out and passed alone. Each test spawns a real `moq auth serve` and
+Seen 2026-10-13 on #5458 and #5481 at load averages near 47 on 24 cores.
+Each test timed out and passed alone. Each test spawns a real `moq auth serve` and
 bounds two waits with a 10 s `TIMEOUT`: the "auth server listening" log line,
 which only gates setup, and the exit after the signal, which is the property.