Remove old field trial test configs (using script from bug)

Bug: 1053702
Change-Id: I123c2282008bd4312752e8f71f8d7d29aad580b2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2626777
Commit-Queue: Caitlin Fischer <caitlinfischer@google.com>
Reviewed-by: Caitlin Fischer <caitlinfischer@google.com>
Cr-Commit-Position: refs/heads/master@{#843582}

testing/variations/fieldtrial_testing_config.json

@@ -3228,21 +3228,6 @@
             ]
         }
     ],
-    "FullscreenController": [
-        {
-            "platforms": [
-                "ios"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "enable_features": [
-                        "FullscreenControllerBrowserScoped"
-                    ]
-                }
-            ]
-        }
-    ],
     "FuzzyAppSearch": [
         {
             "platforms": [
@@ -3449,24 +3434,6 @@
             ]
         }
     ],
-    "IOSDefaultBrowserFullscreenPromo": [
-        {
-            "platforms": [
-                "ios"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "params": {
-                        "min_os_version": "14.0.1"
-                    },
-                    "enable_features": [
-                        "DefaultBrowserFullscreenPromo"
-                    ]
-                }
-            ]
-        }
-    ],
     "IOSDiscoverFeed": [
         {
             "platforms": [
@@ -4460,21 +4427,6 @@
             ]
         }
     ],
-    "NativeContextMenusStudy": [
-        {
-            "platforms": [
-                "ios"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "enable_features": [
-                        "EnableNativeContextMenus"
-                    ]
-                }
-            ]
-        }
-    ],
     "NavigationPredictor": [
         {
             "platforms": [
@@ -4849,25 +4801,6 @@
             ]
         }
     ],
-    "OmniboxLocalEntities": [
-        {
-            "platforms": [
-                "chromeos",
-                "linux",
-                "mac",
-                "windows",
-                "android"
-            ],
-            "experiments": [
-                {
-                    "name": "DesktopAndAndroidExperiments",
-                    "enable_features": [
-                        "OmniboxLocalEntitySuggestions"
-                    ]
-                }
-            ]
-        }
-    ],
     "OmniboxOnDeviceHeadSuggestNonIncognito": [
         {
             "platforms": [
@@ -4886,26 +4819,6 @@
             ]
         }
     ],
-    "OmniboxPreserveDefaultMatchAgainstAsyncUpdate": [
-        {
-            "platforms": [
-                "android",
-                "chromeos",
-                "ios",
-                "linux",
-                "mac",
-                "windows"
-            ],
-            "experiments": [
-                {
-                    "name": "Beta_Enabled",
-                    "enable_features": [
-                        "OmniboxPreserveDefaultMatchAgainstAsyncUpdate"
-                    ]
-                }
-            ]
-        }
-    ],
     "OmniboxRefinedFocusStateDesktop": [
         {
             "platforms": [
@@ -6132,22 +6045,6 @@
             ]
         }
     ],
-    "RevampedContextMenu": [
-        {
-            "platforms": [
-                "android",
-                "android_weblayer"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "enable_features": [
-                        "RevampedContextMenu"
-                    ]
-                }
-            ]
-        }
-    ],
     "SRTPromptFieldTrial": [
         {
             "platforms": [
@@ -7955,21 +7852,6 @@
             ]
         }
     ],
-    "WebComponentsV0": [
-        {
-            "platforms": [
-                "android_webview"
-            ],
-            "experiments": [
-                {
-                    "name": "Disabled_20200708",
-                    "disable_features": [
-                        "WebComponentsV0"
-                    ]
-                }
-            ]
-        }
-    ],
     "WebOtpBackendAuto": [
         {
             "platforms": [