test/sqpoll-cancel-hang: remove test

This is one of those awful syzbot based tests, that make all sorts of
arch assumptions. We've previously disabled it on some archs, but
apparently it's segfaulting on others now.

Just remove it, it's served its purpose.

https://github.com/axboe/liburing/issues/1134
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 files changed