The folio error flag is not checked anywhere, so we can remove the calls
to set and clear it.

Cc: Christian Brauner <brauner@kernel.org>
Cc: linux-xfs@vger.kernel.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://lore.kernel.org/r/20240530202110.2653630-16-willy@infradead.orgReviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>