super: don't bother with WARN_ON_ONCE()

We hold our own active reference and we've checked it above.

Link: https://lore.kernel.org/r/20231127-vfs-super-massage-wait-v1-2-9ab277bfd01a@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Christian Brauner 2023-11-27 12:51:31 +01:00
commit 63513f8574
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