Revert of Add BrowserScheduler field trial to testing config for desktop.

testing/variations/fieldtrial_testing_config.json

Index: testing/variations/fieldtrial_testing_config.json
diff --git a/testing/variations/fieldtrial_testing_config.json b/testing/variations/fieldtrial_testing_config.json
index cae33b807c91150d43fe266626b7e343c6696599..36e2269255ea85d12c2ba237458fca41dfb79f9d 100644
--- a/testing/variations/fieldtrial_testing_config.json
+++ b/testing/variations/fieldtrial_testing_config.json
@@ -178,28 +178,6 @@
             "experiments": [
                 {
                     "name": "Enabled"
-                }
-            ]
-        }
-    ],
-    "BrowserScheduler": [
-        {
-            "platforms": [
-                "chromeos",
-                "linux",
-                "mac",
-                "win"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "params": {
-                        "Background": "3;8;0.1;0;30000",
-                        "BackgroundFileIO": "3;8;0.1;0;30000",
-                        "Foreground": "8;32;0.3;0;30000",
-                        "ForegroundFileIO": "8;32;0.3;0;30000",
-                        "RedirectSequencedWorkerPools": "true"
-                    }
                 }
             ]
         }