Revert "ext4: Fix warnings when freezing filesystem with journaled data"

After making ext4_writepages() properly clean all pages there is no need
for special treatment of filesystem freezing. Revert commit
e6c28a26.

Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230329154950.19720-13-jack@suse.cz


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