NFSD: cleanup dead codes and values in nfsd_write

This is just cleanup, no change in functionality.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index 69cd0f1..045c908 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -193,11 +193,9 @@ nfsd3_proc_write(struct svc_rqst *rqstp, struct nfsd3_writeargs *argp,
 
 	fh_copy(&resp->fh, &argp->fh);
 	resp->committed = argp->stable;
-	nfserr = nfsd_write(rqstp, &resp->fh, NULL,
-				   argp->offset,
-				   rqstp->rq_vec, argp->vlen,
-				   &cnt,
-				   resp->committed);
+	nfserr = nfsd_write(rqstp, &resp->fh, argp->offset,
+				rqstp->rq_vec, argp->vlen,
+				&cnt, resp->committed);
 	resp->count = cnt;
 	RETURN_STATUS(nfserr);
 }