Reload Reloaded: remove experimental flag that has been enabled by default

testing/variations/fieldtrial_testing_config.json

 {
     "AndroidSessionNotifications": [
         {
             "platforms": [
                 "android"
             ],
             "experiments": [
                 {
                     "name": "Disabled"
                 }
@@ skipping 1165 matching lines @@
             "platforms": [
                 "android"
             ],
             "experiments": [
                 {
                     "name": "Disabled"
                 }
             ]
         }
     ],
-    "NonValidatingReloadOnNormalReload": [
-        {
-            "platforms": [
-                "android",
-                "linux",
-                "mac",
-                "win"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "enable_features": [
-                        "NonValidatingReloadOnNormalReload"
-                    ]
-                }
-            ]
-        }
-    ],
     "OfferUploadCreditCards": [
         {
             "platforms": [
                 "android",
                 "chromeos",
                 "linux",
                 "mac",
                 "win"
             ],
             "experiments": [
@@ skipping 1215 matching lines @@
                 {
                     "name": "Enabled",
                     "enable_features": [
                         "use-new-media-cache"
                     ]
                 }
             ]
         }
     ]
 }