Revert "io_uring: wait potential ->release() on resurrect"

Revert "io_uring: wait potential ->release() on resurrect"

This reverts commit 88f171ab7798a1ed0b9e39867ee16f307466e870.

I ran into a case where the ref resurrect now spins, so revert
this change for now until we can further investigate why it's
broken. The bug seems to indicate spinning on the lock itself,
likely there's some ABBA deadlock involved:

[<0>] __percpu_ref_switch_mode+0x45/0x180
[<0>] percpu_ref_resurrect+0x46/0x70
[<0>] io_refs_resurrect+0x25/0xa0
[<0>] __io_uring_register+0x135/0x10c0
[<0>] __x64_sys_io_uring_register+0xc2/0x1a0
[<0>] do_syscall_64+0x42/0x110
[<0>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

Signed-off-by: Jens Axboe <axboe@kernel.dk>