Do not create FormDataList instances.

Source/core/html/FormDataList.h

Index: Source/core/html/FormDataList.h
diff --git a/Source/core/html/FormDataList.h b/Source/core/html/FormDataList.h
index 555d26be0318142a71e7305aeced665366c16b43..65b64e44c62c9cd8b218559fe61661a2bc201a80 100644
--- a/Source/core/html/FormDataList.h
+++ b/Source/core/html/FormDataList.h
@@ -32,6 +32,7 @@
 
 namespace blink {
 
+// TODO(tkent): Merge FormDataList into DOMFormData.
 class CORE_EXPORT FormDataList : public GarbageCollected<FormDataList> {
 public:
     // TODO(tkent): Merge Entry and Item.
@@ -82,11 +83,6 @@ public:
         String m_filename;
     };
 
-    static FormDataList* create(const WTF::TextEncoding& encoding)
-    {
-        return new FormDataList(encoding);
-    }
-
     using FormDataListItems = HeapVector<FormDataList::Item>;
 
     void appendData(const String& key, const String& value)