ext4: remove nr_submitted from ext4_bio_write_page()

nr_submitted is the same as nr_to_submit.  Drop one of them.

Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20221207112722.22220-3-jack@suse.cz


Signed-off-by: Theodore Ts'o <tytso@mit.edu>