Clean up testing configs post-launch

These experiments have all landed as enabled by default.

Bug: None
Change-Id: I47f27ae2074d66e1a6454884253baae4443ab64f
Reviewed-on: https://chromium-review.googlesource.com/965933Reviewed-by: Ilya Sherman <isherman@chromium.org>
Commit-Queue: Ilya Sherman <isherman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543901}

testing/variations/fieldtrial_testing_config.json

 {
-    "AbusiveExperienceEnforce": [
-        {
-            "platforms": [
-                "android",
-                "chromeos",
-                "linux",
-                "mac",
-                "win"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "enable_features": [
-                        "AbusiveExperienceEnforce"
-                    ]
-                }
-            ]
-        }
-    ],
     "AccountConsistencyVariations": [
         {
             "platforms": [
@@ -1208,21 +1189,6 @@
             ]
         }
     ],
-    "DispatchSafetyNetCheckOffThread": [
-        {
-            "platforms": [
-                "android"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "enable_features": [
-                        "DispatchSafetyNetCheckOffThread"
-                    ]
-                }
-            ]
-        }
-    ],
     "DownloadHomeMoreButton": [
         {
             "platforms": [
@@ -3654,33 +3620,6 @@
             ]
         }
     ],
-    "SubresourceFilter": [
-        {
-            "platforms": [
-                "android",
-                "chromeos",
-                "linux",
-                "mac",
-                "win"
-            ],
-            "experiments": [
-                {
-                    "name": "LiveRun_BAS_Phishing",
-                    "params": {
-                        "enable_presets": "liverun_on_phishing_sites,liverun_on_better_ads_violating_sites"
-                    },
-                    "enable_features": [
-                        "SubresourceFilter",
-                        "SubresourceFilterExperimentalUI"
-                    ]
-                },
-                {
-                    "name": "VerifyFeatureIsStillDisabledByDefault",
-                    "forcing_flag": "suppress-enabling-subresource-filter-from-fieldtrial-testing-config"
-                }
-            ]
-        }
-    ],
     "SuperfishInterstitial": [
         {
             "platforms": [