btrfs: remove unused variables from disk-io.c
Remove unused variables: * tree from csum_dirty_buffer, * tree from btree_readpage_end_io_hook, * tree from btree_writepages, * bytenr from btrfs_create_tree, * fs_info from end_workqueue_fn. Signed-off-by: Valentina Giusti <valentina.giusti@microon.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
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