diff --git a/mktextdocument.cpp b/mktextdocument.cpp
index a511c89..20bf6d9 100644
--- a/mktextdocument.cpp
+++ b/mktextdocument.cpp
@@ -654,21 +654,6 @@ void MkTextDocument::applyCheckBoxLinkEffect(FormatData *data, QTextBlock &block
     }
 }
 
-void MkTextDocument::applyCheckBoxLinkEffect(QTextBlock &block, int start, int end, FragmentData::FormatSymbol status)
-{
-    if( status == FragmentData::CHECKED_END || status == FragmentData::UNCHECKED_END ){
-        const QPair<int,int> checkPos(block.blockNumber(), start);
-        if(!checkMarkPositions.contains(checkPos)){
-            checkMarkPositions.append(checkPos);
-        }
-    }else if(status == FragmentData::LINK_TITLE){
-        const std::tuple<int,int,int> linkPos(block.blockNumber(), start, end);
-        if(!linkPositions.contains(linkPos)){
-            linkPositions.append(linkPos);
-        }
-    }
-}
-
 void MkTextDocument::hideSymbols(QTextBlock &block,const QString &symbol)
 {
     QString textBlock = block.text();
diff --git a/mktextdocument.h b/mktextdocument.h
index dc3a619..ebc86da 100644
--- a/mktextdocument.h
+++ b/mktextdocument.h
@@ -212,7 +212,6 @@ public slots:
     void resetTextBlockFormat(QTextBlock block);
     void applyMkFormat(QTextBlock &block, int start, int end, FragmentData::FormatSymbol status,FormatCollection &formatCollection);
     void applyCheckBoxLinkEffect(FormatData *data, QTextBlock &block, QTextCursor &cursor);
-    void applyCheckBoxLinkEffect(QTextBlock &block, int start, int end, FragmentData::FormatSymbol status);
     void hideSymbols(QTextBlock &block,const QString &symbol);
     void hideSymbolsAtPos(QString &text, int pos, const QString &symbol);