ext4: remove redundant condition check
ext4_xattr_destroy_cache() can handle NULL pointer correctly, so there is no need to check NULL pointer before calling ext4_xattr_destroy_cache(). Reviewed-by: NJan Kara <jack@suse.cz> Signed-off-by: NChengguang Xu <cgxu519@gmx.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
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