Whenever I make a Qt project, the qmake command includes this parameter:
CONFIG += qml_debug
I never use QML and don't want to manually click three times and ignore the warning every time I generate a new project.
Check Projects -> Build & Run -> Run Settings. There is an "Enable QML" setting, mine is disabled.
If not, I advise you to check Tools -> Options -> Build & Run, and Tools -> Options -> Debuggers.