make new_sync_{read,write}() static

All places outside of core VFS that checked ->read and ->write for being NULL or
called the methods directly are gone now, so NULL {read,write} with non-NULL
{read,write}_iter will do the right thing in all cases.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/block_dev.c

@@ -1659,8 +1659,6 @@ const struct file_operations def_blk_fops = {
 	.open		= blkdev_open,
 	.release	= blkdev_close,
 	.llseek		= block_llseek,
-	.read		= new_sync_read,
-	.write		= new_sync_write,
 	.read_iter	= blkdev_read_iter,
 	.write_iter	= blkdev_write_iter,
 	.mmap		= generic_file_mmap,