ufs: remove unessecary blk_flush_plug

We already flush the per-process plugging list when context switching,
so a blk_flush_plug call just before a yield() is not needed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/fs/ufs/truncate.c b/fs/ufs/truncate.c
index 1101430..5f821db 100644
--- a/fs/ufs/truncate.c
+++ b/fs/ufs/truncate.c
@@ -479,7 +479,6 @@
 			break;
 		if (IS_SYNC(inode) && (inode->i_state & I_DIRTY))
 			ufs_sync_inode (inode);
-		blk_flush_plug(current);
 		yield();
 	}