btrfs: remove duplicated leaf dirty status clearing in __push_leaf_right()

We have already called btrfs_clear_buffer_dirty() against the left leaf in
the code above:

  btrfs_set_header_nritems(left, left_nritems);

  if (left_nritems)
       btrfs_mark_buffer_dirty(trans, left);
  else
       btrfs_clear_buffer_dirty(trans, left);

So remove the second check for a 0 number of items in the left leaf and
calling again btrfs_clear_buffer_dirty() against the left leaf.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Author: fdmanana

fs/btrfs/ctree.c

@@ -3240,8 +3240,6 @@ static noinline int __push_leaf_right(struct btrfs_trans_handle *trans,
 	/* then fixup the leaf pointer in the path */
 	if (path->slots[0] >= left_nritems) {
 		path->slots[0] -= left_nritems;
-		if (btrfs_header_nritems(left) == 0)
-			btrfs_clear_buffer_dirty(trans, left);
 		btrfs_tree_unlock(left);
 		free_extent_buffer(left);
 		path->nodes[0] = right;