Revert of Add an experimental standalone content suggestions UI.

chrome/browser/android/chrome_feature_list.cc

Index: chrome/browser/android/chrome_feature_list.cc
diff --git a/chrome/browser/android/chrome_feature_list.cc b/chrome/browser/android/chrome_feature_list.cc
index 5d399dcc526628f83f62324f5d5b7cd2b5fc78f3..a04b5f45c7f627856d06ee96addd2e61cfc89215 100644
--- a/chrome/browser/android/chrome_feature_list.cc
+++ b/chrome/browser/android/chrome_feature_list.cc
@@ -51,7 +51,6 @@
     &kNoCreditCardAbort,
     &kNTPFakeOmniboxTextFeature,
     &kNTPOfflinePagesFeature,
-    &kNTPSuggestionsStandaloneUIFeature,
     &kPhysicalWebFeature,
     &kPhysicalWebIgnoreOtherClientsFeature,
     &kSpecialLocaleFeature,
@@ -114,9 +113,6 @@
 const base::Feature kNTPOfflinePagesFeature{"NTPOfflinePages",
                                             base::FEATURE_ENABLED_BY_DEFAULT};
 
-const base::Feature kNTPSuggestionsStandaloneUIFeature{
-    "NTPSuggestionsStandaloneUI", base::FEATURE_DISABLED_BY_DEFAULT};
-
 const base::Feature kPhysicalWebFeature{"PhysicalWeb",
                                         base::FEATURE_ENABLED_BY_DEFAULT};