Remove ReadJSONFile

client/internal/common/json.go

 // Copyright 2015 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package common
 
 import (
         "encoding/json"
         "fmt"
         "os"
 )
 
-// ReadJSONFile reads a file and decode it as JSON.
-func ReadJSONFile(filePath string, object interface{}) error {
-        f, err := os.Open(filePath)
-        if err != nil {
-                return fmt.Errorf("failed to open %s: %s", filePath, err)
-        }
-        defer f.Close()
-        if err = json.NewDecoder(f).Decode(object); err != nil {
-                return fmt.Errorf("failed to decode %s: %s", filePath, err)
-        }
-        return nil
-}
-
 // WriteJSONFile writes object as json encoded into filePath with 2 spaces
 // indentation. File permission is set to user only.
 func WriteJSONFile(filePath string, object interface{}) error {
         d, err := json.MarshalIndent(object, "", "  ")
         if err != nil {
                 return fmt.Errorf("failed to encode %s: %s", filePath, err)
         }
 
         f, err := os.OpenFile(filePath, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
         if err != nil {
                 return fmt.Errorf("failed to open %s: %s", filePath, err)
         }
         defer f.Close()
         if _, err := f.Write(d); err != nil {
                 return fmt.Errorf("failed to write %s: %s", filePath, err)
         }
         return nil
 }