Additional JSON experiment cleanups.

Bug: 881076
Change-Id: Id23c8d573e8e6450640e355cbe49d104bba4ae50
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1564551
Auto-Submit: Joshua Pawlicki <waffles@chromium.org>
Commit-Queue: Steven Holte <holte@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Cr-Commit-Position: refs/heads/master@{#650371}

components/update_client/test_configurator.h

diff --git a/components/update_client/test_configurator.h b/components/update_client/test_configurator.h
index 3376cec..6de974c 100644
--- a/components/update_client/test_configurator.h
+++ b/components/update_client/test_configurator.h
@@ -114,7 +114,6 @@
   void SetUpdateCheckUrl(const GURL& url);
   void SetPingUrl(const GURL& url);
   void SetAppGuid(const std::string& app_guid);
-  void SetUseJSON(bool use_JSON);
   network::TestURLLoaderFactory* test_url_loader_factory() {
     return &test_url_loader_factory_;
   }
@@ -134,7 +133,6 @@
   GURL update_check_url_;
   GURL ping_url_;
   std::string app_guid_;
-  bool use_JSON_;
 
   service_manager::TestConnectorFactory connector_factory_;
   scoped_refptr<update_client::UnzipChromiumFactory> unzip_factory_;

testing/variations/fieldtrial_testing_config.json

diff --git a/testing/variations/fieldtrial_testing_config.json b/testing/variations/fieldtrial_testing_config.json
index ed541d0..a592c25 100644
--- a/testing/variations/fieldtrial_testing_config.json
+++ b/testing/variations/fieldtrial_testing_config.json
@@ -5287,26 +5287,6 @@
             ]
         }
     ],
-    "UpdateClientUseJSON": [
-        {
-            "platforms": [
-                "android",
-                "chromeos",
-                "linux",
-                "mac",
-                "windows",
-                "ios"
-            ],
-            "experiments": [
-                {
-                    "name": "UpdateClientUseJSON",
-                    "enable_features": [
-                        "UpdateClientUseJSON"
-                    ]
-                }
-            ]
-        }
-    ],
     "UpdateMenuItem": [
         {
             "platforms": [