src/pkg/[n-z]*: gofix -r error -force=error

R=golang-dev, bsiegert, iant
CC=golang-dev
https://golang.org/cl/5294074
diff --git a/src/pkg/net/sendfile_stub.go b/src/pkg/net/sendfile_stub.go
index c55be6c..b0adea4 100644
--- a/src/pkg/net/sendfile_stub.go
+++ b/src/pkg/net/sendfile_stub.go
@@ -6,11 +6,8 @@
 
 package net
 
-import (
-	"io"
-	"os"
-)
+import "io"
 
-func sendFile(c *netFD, r io.Reader) (n int64, err os.Error, handled bool) {
+func sendFile(c *netFD, r io.Reader) (n int64, err error, handled bool) {
 	return 0, nil, false
 }