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 <[email protected]>

fs/pipe.c

@@ -946,9 +946,7 @@ err:
 const struct file_operations pipefifo_fops = {
 	.open		= fifo_open,
 	.llseek		= no_llseek,
-	.read		= new_sync_read,
 	.read_iter	= pipe_read,
-	.write		= new_sync_write,
 	.write_iter	= pipe_write,
 	.poll		= pipe_poll,
 	.unlocked_ioctl	= pipe_ioctl,