Remove the Vector::append overload that takes a Vector

Source/core/html/parser/HTMLFormattingElementList.cpp

Index: Source/core/html/parser/HTMLFormattingElementList.cpp
diff --git a/Source/core/html/parser/HTMLFormattingElementList.cpp b/Source/core/html/parser/HTMLFormattingElementList.cpp
index 34215d75e2648ad90c189a8c8450f20a15fa6e8a..08128d77de9c4f9488fb89ae6a42895c3295b1bf 100644
--- a/Source/core/html/parser/HTMLFormattingElementList.cpp
+++ b/Source/core/html/parser/HTMLFormattingElementList.cpp
@@ -155,7 +155,7 @@ void HTMLFormattingElementList::tryToEnsureNoahsArkConditionQuickly(HTMLStackIte
     if (candidates.size() < kNoahsArkCapacity)
         return; // There's room for the new element in the ark. There's no need to copy out the remainingCandidates.
 
-    remainingCandidates.append(candidates);
+    remainingCandidates.appendVector(candidates);
 }
 
 void HTMLFormattingElementList::ensureNoahsArkCondition(HTMLStackItem* newItem)