Remove categories notified as invalid

ios/chrome/browser/ui/content_suggestions/content_suggestions_view_controller.mm

Index: ios/chrome/browser/ui/content_suggestions/content_suggestions_view_controller.mm
diff --git a/ios/chrome/browser/ui/content_suggestions/content_suggestions_view_controller.mm b/ios/chrome/browser/ui/content_suggestions/content_suggestions_view_controller.mm
index 25a4d97419857a9596cf1e5679b6fef0f1dc162d..fc6137156993d22a183cf6da93908d76f00d19f6 100644
--- a/ios/chrome/browser/ui/content_suggestions/content_suggestions_view_controller.mm
+++ b/ios/chrome/browser/ui/content_suggestions/content_suggestions_view_controller.mm
@@ -66,7 +66,25 @@ const NSTimeInterval kAnimationDuration = 0.35;
     [self.collectionView deleteItemsAtIndexPaths:@[ indexPath ]];
   }
       completion:^(BOOL) {
-        // The context menu could be displayed for the delete entry.
+        // The context menu could be displayed for the deleted entry.
+        [self.suggestionCommandHandler dismissContextMenu];
+      }];
+}
+
+- (void)dismissSection:(NSInteger)section {
+  if (section >= [self numberOfSectionsInCollectionView:self.collectionView]) {
+    return;
+  }
+
+  NSInteger sectionIdentifier =
+      [self.collectionViewModel sectionIdentifierForSection:section];
+
+  [self.collectionView performBatchUpdates:^{
+    [self.collectionViewModel removeSectionWithIdentifier:sectionIdentifier];
+    [self.collectionView deleteSections:[NSIndexSet indexSetWithIndex:section]];
+  }
+      completion:^(BOOL) {
+        // The context menu could be displayed for the deleted entries.
         [self.suggestionCommandHandler dismissContextMenu];
       }];
 }