remove extraneous open fn

util_unix.go

@@ -14,7 +14,3 @@ func tempFile(dir, pattern string) (*os.File, error) {
 func readFile(filename string) ([]byte, error) {
 	return ioutil.ReadFile(filename)
 }
-
-func open(name string) (*os.File, error) {
-	return os.Open(name)
-}

util_windows.go

@@ -91,7 +91,3 @@ func readFile(filename string) ([]byte, error) {
 
 	return ioutil.ReadAll(f)
 }
-
-func open(name string) (*os.File, error) {
-	return goissue34681.Open(name)
-}