Cleanup AppListZeroStateMixedTypesRanker from fieldtrial_testing_config.json.

R=dom@chromium.org

Bug: 1289680
Change-Id: I88ae7fa789a102d3467c49143b7011e0881d1640
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3407894
Auto-Submit: Francois Pierre Doray <fdoray@chromium.org>
Reviewed-by: Tony Yeoman <tby@chromium.org>
Commit-Queue: Tony Yeoman <tby@chromium.org>
Cr-Commit-Position: refs/heads/main@{#962881}
diff --git a/testing/variations/fieldtrial_testing_config.json b/testing/variations/fieldtrial_testing_config.json
index 061c3d5..6941214e 100644
--- a/testing/variations/fieldtrial_testing_config.json
+++ b/testing/variations/fieldtrial_testing_config.json
@@ -506,21 +506,6 @@
             ]
         }
     ],
-    "AppListZeroStateMixedTypesRanker": [
-        {
-            "platforms": [
-                "chromeos"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled_20191017",
-                    "enable_features": [
-                        "EnableZeroStateMixedTypesRanker"
-                    ]
-                }
-            ]
-        }
-    ],
     "ApplyNativeOcclusionToCompositor": [
         {
             "platforms": [