NFS: remove pointless if statement in nfs_direct_write_result

The code was doing nothing more in either branch of the if.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 9943a75..f493bdd 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -649,8 +649,7 @@
 {
 	struct nfs_write_data *data = calldata;
 
-	if (nfs_writeback_done(task, data) != 0)
-		return;
+	nfs_writeback_done(task, data);
 }
 
 /*