diff --git a/mimetreeparser/src/objecttreeparser.h b/mimetreeparser/src/objecttreeparser.h
--- a/mimetreeparser/src/objecttreeparser.h
+++ b/mimetreeparser/src/objecttreeparser.h
@@ -327,8 +327,6 @@
 
     const QTextCodec *codecFor(KMime::Content *node) const;
 
-    void copyContentFrom(const ObjectTreeParser *other);
-
 private:
     Interface::ObjectTreeSource *mSource;
     NodeHelper *mNodeHelper;
diff --git a/mimetreeparser/src/objecttreeparser.cpp b/mimetreeparser/src/objecttreeparser.cpp
--- a/mimetreeparser/src/objecttreeparser.cpp
+++ b/mimetreeparser/src/objecttreeparser.cpp
@@ -135,18 +135,6 @@
     return mHtmlContent;
 }
 
-void ObjectTreeParser::copyContentFrom(const ObjectTreeParser *other)
-{
-    mPlainTextContent += other->plainTextContent();
-    mHtmlContent += other->htmlContent();
-    if (!other->plainTextContentCharset().isEmpty()) {
-        mPlainTextContentCharset = other->plainTextContentCharset();
-    }
-    if (!other->htmlContentCharset().isEmpty()) {
-        mHtmlContentCharset = other->htmlContentCharset();
-    }
-}
-
 //-----------------------------------------------------------------------------
 
 void ObjectTreeParser::parseObjectTree(KMime::Content *node, bool parseOnlySingleNode)