Remove the TriggeredResetFieldTrial feature.

The feature was added in https://codereview.chromium.org/1294923003.

Bug: 1126640
Change-Id: Ic725b63fd699f1d1ab46534e27deb2536814c582
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2427883Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Reviewed-by: Bettina Dea <bdea@chromium.org>
Commit-Queue: Caitlin Fischer <caitlinfischer@google.com>
Cr-Commit-Position: refs/heads/master@{#813256}

testing/variations/fieldtrial_testing_config.json

@@ -6941,18 +6941,6 @@
             ]
         }
     ],
-    "TriggeredResetFieldTrial": [
-        {
-            "platforms": [
-                "windows"
-            ],
-            "experiments": [
-                {
-                    "name": "On"
-                }
-            ]
-        }
-    ],
     "TrustTokenOriginTrial": [
         {
             "platforms": [