Removed a dead store in sf::Ftp implementation

src/SFML/Network/Ftp.cpp

@@ -438,9 +438,6 @@ Ftp::Response Ftp::getResponse()
                     // we haven't reached the end of the multiline response
                     if ((separator != '-') && ((code == lastCode) || (lastCode == 0)))
                     {
-                        // Clear the multiline flag
-                        isInsideMultiline = false;
-
                         // Extract the line
                         std::string line;
                         std::getline(in, line);