CryptAuth: Remove unused CalculateDeviceUserId.

R=khorimoto@chromium.org

Bug: 899324
Test: none
Change-Id: Ia4d3093f9f70dd3aeeb0a49d87475bc3f4f2c58d
Reviewed-on: https://chromium-review.googlesource.com/c/1330891Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: James Hawkins <jhawkins@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607272}

components/cryptauth/cryptauth_enrollment_utils.cc

@@ -4,12 +4,9 @@
 
 #include "components/cryptauth/cryptauth_enrollment_utils.h"
 
-#include <math.h>
 #include <stddef.h>
 
-#include "base/base64url.h"
 #include "base/md5.h"
-#include "base/sha1.h"
 
 namespace cryptauth {
 
@@ -32,13 +29,4 @@ int64_t HashStringToInt64(const std::string& string) {
   return hash;
 }
 
-std::string CalculateDeviceUserId(const std::string& device_id,
-                                  const std::string& user_id) {
-  std::string device_user_id;
-  base::Base64UrlEncode(base::SHA1HashString(device_id + "|" + user_id),
-                        base::Base64UrlEncodePolicy::INCLUDE_PADDING,
-                        &device_user_id);
-  return device_user_id;
-}
-
 }  // namespace cryptauth

components/cryptauth/cryptauth_enrollment_utils.h

@@ -10,10 +10,6 @@
 
 namespace cryptauth {
 
-// Calculates an id for the specified user on the specified device.
-std::string CalculateDeviceUserId(const std::string& device_id,
-                                  const std::string& user_id);
-
 // Hashes |string| to an int64_t value. These int64_t hashes are used to fill
 // the GcmDeviceInfo proto to upload to CryptAuth.
 int64_t HashStringToInt64(const std::string& string);