refactor: Remove Qt function to disable menu icons on macOS

src/qt/bitcoin.cpp

@@ -436,9 +436,6 @@ int GuiMain(int argc, char* argv[])
 #if QT_VERSION >= 0x050600
     QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
 #endif
-#ifdef Q_OS_MAC
-    QApplication::setAttribute(Qt::AA_DontShowIconsInMenus);
-#endif
 
     BitcoinApplication app(*node);