erofs: get rid of unneeded `inode', `map' and `sb'

Since commit 5c6dcc57 ("erofs: get rid of
`struct z_erofs_collector'"), these arguments can be dropped as well.

No logic changes.

Reviewed-by: Yue Hu <huyue2@coolpad.com>
Acked-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220715154203.48093-2-hsiangkao@linux.alibaba.com