test/TestMultiStock: remove bogus failure
test/TestMultiStock: remove bogus failure

Broken since commit 9f09f6b79b69ac97d2843ddb26a10b8ff7260441 changed
the internal behavior.

CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy