Remove GlobalMediaControlsInProductHelp from the testing config.

Bug: 1126640
Change-Id: Ib1322083b9e0dca577b3ccb301be47a14fb875b8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2626521Reviewed-by: Tommy Steimel <steimel@chromium.org>
Commit-Queue: Caitlin Fischer <caitlinfischer@google.com>
Cr-Commit-Position: refs/heads/master@{#843270}

testing/variations/fieldtrial_testing_config.json

@@ -3318,31 +3318,6 @@
             ]
         }
     ],
-    "GlobalMediaControlsInProductHelp": [
-        {
-            "platforms": [
-                "linux",
-                "mac",
-                "windows"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "params": {
-                        "availability": ">=0",
-                        "event_conditions_met": "name:media_backgrounded;comparator:>0;window:1;storage:365",
-                        "event_trigger": "name:global_media_controls_iph_triggered;comparator:==0;window:90;storage:365",
-                        "event_used": "name:global_media_controls_opened;comparator:==0;window:90;storage:365",
-                        "session_rate": "==0"
-                    },
-                    "enable_features": [
-                        "GlobalMediaControls",
-                        "IPH_GlobalMediaControls"
-                    ]
-                }
-            ]
-        }
-    ],
     "GlobalMediaControlsPictureInPicture": [
         {
             "platforms": [