[Offline Pages] Remove a debugging feature and a misleading flag.

components/offline_pages/offline_page_feature.cc

Index: components/offline_pages/offline_page_feature.cc
diff --git a/components/offline_pages/offline_page_feature.cc b/components/offline_pages/offline_page_feature.cc
index b4620fc13ea57c78383ed8738b5be7983af317c6..e64dea3fd763d9abfaf9aa5128c121c740eef419 100644
--- a/components/offline_pages/offline_page_feature.cc
+++ b/components/offline_pages/offline_page_feature.cc
@@ -18,10 +18,6 @@ const base::Feature kOffliningRecentPagesFeature {
    "OfflineRecentPages", base::FEATURE_DISABLED_BY_DEFAULT
 };
 
-const base::Feature kOfflinePagesBackgroundLoadingFeature {
-   "OfflinePagesBackgroundLoading", base::FEATURE_DISABLED_BY_DEFAULT
-};
-
 const base::Feature kOfflinePagesCTFeature {
    "OfflinePagesCT", base::FEATURE_ENABLED_BY_DEFAULT
 };
@@ -44,10 +40,6 @@ bool IsOffliningRecentPagesEnabled() {
   return  base::FeatureList::IsEnabled(kOffliningRecentPagesFeature);
 }
 
-bool IsOfflinePagesBackgroundLoadingEnabled() {
-  return base::FeatureList::IsEnabled(kOfflinePagesBackgroundLoadingFeature);
-}
-
 bool IsOfflinePagesCTEnabled() {
   return base::FeatureList::IsEnabled(kOfflinePagesCTFeature);
 }