70476. Backing out my changes for #68875. No reviewer

mailnews/local/src/nsParseMailbox.cpp

@@ -1951,7 +1951,6 @@ nsresult nsParseNewMailState::MoveIncorporatedMessage(nsIMsgDBHdr *mailHdr,
 	}
 
 	destFile->close();
-        delete destFile;
 	m_inboxFileStream->close();
 	// How are we going to do this with a stream?
 	nsresult truncRet = m_inboxFileSpec.Truncate(messageOffset);