use go 1.12

Signed-off-by: hongming <talonwan@yunify.com>

vendor/github.com/googleapis/gnostic/compiler/reader.go

@@ -15,7 +15,6 @@
 package compiler
 
 import (
-	"errors"
 	"fmt"
 	"gopkg.in/yaml.v2"
 	"io/ioutil"
@@ -54,16 +53,11 @@ func FetchFile(fileurl string) ([]byte, error) {
 		}
 		return bytes, nil
 	}
-	if verboseReader {
-		log.Printf("Fetching %s", fileurl)
-	}
+	log.Printf("Fetching %s", fileurl)
 	response, err := http.Get(fileurl)
 	if err != nil {
 		return nil, err
 	}
-	if response.StatusCode != 200 {
-		return nil, errors.New(fmt.Sprintf("Error downloading %s: %s", fileurl, response.Status))
-	}
 	defer response.Body.Close()
 	bytes, err = ioutil.ReadAll(response.Body)
 	if err == nil {
@@ -110,9 +104,7 @@ func ReadInfoFromBytes(filename string, bytes []byte) (interface{}, error) {
 	if err != nil {
 		return nil, err
 	}
-	if len(filename) > 0 {
-		infoCache[filename] = info
-	}
+	infoCache[filename] = info
 	return info, nil
 }