Remove dynamic cast from DocumentPaser interface

sky/engine/core/html/parser/HTMLDocumentParser.cpp

Index: sky/engine/core/html/parser/HTMLDocumentParser.cpp
diff --git a/sky/engine/core/html/parser/HTMLDocumentParser.cpp b/sky/engine/core/html/parser/HTMLDocumentParser.cpp
index 18d84cceaa19331effc66fd610fcb4311103a10a..d84502f1959d99fbbddb59f65da15146625dadb8 100644
--- a/sky/engine/core/html/parser/HTMLDocumentParser.cpp
+++ b/sky/engine/core/html/parser/HTMLDocumentParser.cpp
@@ -143,11 +143,6 @@ bool HTMLDocumentParser::isParsingFragment() const
     return m_treeBuilder->isParsingFragment();
 }
 
-bool HTMLDocumentParser::processingData() const
-{
-    return isScheduledForResume() || inPumpSession() || m_haveBackgroundParser;
-}
-
 bool HTMLDocumentParser::isScheduledForResume() const
 {
     return m_parserScheduler && m_parserScheduler->isScheduledForResume();