[Launcher] Remove obsolete ranking feature flags.

Test: existing
Bug: 1378866
Change-Id: I26757f4e9d74f1e04234c214a8387a71f70792be
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4016040
Commit-Queue: Amanda Deacon <amandadeacon@chromium.org>
Reviewed-by: Toni Barzic <tbarzic@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1068992}

ash/public/cpp/app_list/app_list_features.cc

@@ -10,15 +10,6 @@
 
 namespace app_list_features {
 
-BASE_FEATURE(kEnableAppRanker,
-             "EnableAppRanker",
-             base::FEATURE_ENABLED_BY_DEFAULT);
-BASE_FEATURE(kEnableZeroStateAppsRanker,
-             "EnableZeroStateAppsRanker",
-             base::FEATURE_ENABLED_BY_DEFAULT);
-BASE_FEATURE(kEnableZeroStateMixedTypesRanker,
-             "EnableZeroStateMixedTypesRanker",
-             base::FEATURE_ENABLED_BY_DEFAULT);
 BASE_FEATURE(kEnableAppReinstallZeroState,
              "EnableAppReinstallZeroState",
              base::FEATURE_DISABLED_BY_DEFAULT);
@@ -51,18 +42,6 @@ BASE_FEATURE(kAnimateScaleOnTabletModeTransition,
              "AnimateScaleOnTabletModeTransition",
              base::FEATURE_ENABLED_BY_DEFAULT);
 
-bool IsAppRankerEnabled() {
-  return base::FeatureList::IsEnabled(kEnableAppRanker);
-}
-
-bool IsZeroStateAppsRankerEnabled() {
-  return base::FeatureList::IsEnabled(kEnableZeroStateAppsRanker);
-}
-
-bool IsZeroStateMixedTypesRankerEnabled() {
-  return base::FeatureList::IsEnabled(kEnableZeroStateMixedTypesRanker);
-}
-
 bool IsAppReinstallZeroStateEnabled() {
   return base::FeatureList::IsEnabled(kEnableAppReinstallZeroState);
 }
@@ -71,14 +50,6 @@ bool IsExactMatchForNonLatinLocaleEnabled() {
   return base::FeatureList::IsEnabled(kEnableExactMatchForNonLatinLocale);
 }
 
-std::string AppSearchResultRankerPredictorName() {
-  const std::string predictor_name = base::GetFieldTrialParamValueByFeature(
-      kEnableZeroStateAppsRanker, "app_search_result_ranker_predictor_name");
-  if (!predictor_name.empty())
-    return predictor_name;
-  return std::string("MrfuAppLaunchPredictor");
-}
-
 bool IsAppListLaunchRecordingEnabled() {
   return base::FeatureList::IsEnabled(kEnableAppListLaunchRecording);
 }

ash/public/cpp/app_list/app_list_features.h

@@ -5,8 +5,6 @@
 #ifndef ASH_PUBLIC_CPP_APP_LIST_APP_LIST_FEATURES_H_
 #define ASH_PUBLIC_CPP_APP_LIST_APP_LIST_FEATURES_H_
 
-#include <string>
-
 #include "ash/public/cpp/ash_public_export.h"
 #include "base/feature_list.h"
 #include "base/time/time.h"
@@ -16,18 +14,6 @@ namespace app_list_features {
 // Please keep these features sorted.
 // TODO(newcomer|weidongg): Sort these features.
 
-// Enable app ranking models.
-ASH_PUBLIC_EXPORT BASE_DECLARE_FEATURE(kEnableAppRanker);
-
-// Enable a model that ranks zero-state apps search result.
-// TODO(crbug.com/989350): This flag can be removed once the
-// AppSearchResultRanker is removed. Same with the
-// AppSearchResultRankerPredictorName.
-ASH_PUBLIC_EXPORT BASE_DECLARE_FEATURE(kEnableZeroStateAppsRanker);
-
-// Enable a model that ranks zero-state files and recent queries.
-ASH_PUBLIC_EXPORT BASE_DECLARE_FEATURE(kEnableZeroStateMixedTypesRanker);
-
 // Enables the feature to include a single reinstallation candidate in
 // zero-state.
 ASH_PUBLIC_EXPORT BASE_DECLARE_FEATURE(kEnableAppReinstallZeroState);
@@ -64,9 +50,6 @@ ASH_PUBLIC_EXPORT BASE_DECLARE_FEATURE(kLauncherPlayStoreSearch);
 // instead of slide up/down).
 ASH_PUBLIC_EXPORT BASE_DECLARE_FEATURE(kAnimateScaleOnTabletModeTransition);
 
-ASH_PUBLIC_EXPORT bool IsAppRankerEnabled();
-ASH_PUBLIC_EXPORT bool IsZeroStateAppsRankerEnabled();
-ASH_PUBLIC_EXPORT bool IsZeroStateMixedTypesRankerEnabled();
 ASH_PUBLIC_EXPORT bool IsAppReinstallZeroStateEnabled();
 ASH_PUBLIC_EXPORT bool IsAppListLaunchRecordingEnabled();
 ASH_PUBLIC_EXPORT bool IsExactMatchForNonLatinLocaleEnabled();
@@ -81,8 +64,6 @@ ASH_PUBLIC_EXPORT bool IsCompactBubbleLauncherEnabled();
 ASH_PUBLIC_EXPORT bool IsLauncherPlayStoreSearchEnabled();
 ASH_PUBLIC_EXPORT bool IsAnimateScaleOnTabletModeTransitionEnabled();
 
-ASH_PUBLIC_EXPORT std::string AppSearchResultRankerPredictorName();
-
 }  // namespace app_list_features
 
 #endif  // ASH_PUBLIC_CPP_APP_LIST_APP_LIST_FEATURES_H_