Debug output when using Audio in qrc file

I'm using the Audio element from Qt Multimedia 5.0 in my game:

Audio {
    id: lonelyAudio
    source: "qrc:/audio/lonely.wav"
}

When the sound loads, I get the following output in the console, even though I have no print or console.log statements anywhere:

qrc file :/audio/lonely.wav
Size 270416
Sequential 0

This happens in both debug and release builds.

It looks like the debug statements have been there since 2011:
https://github.com/qtproject/qtmultimedia/blame/stable/src/plugins/directshow/player/directshowiosource.cpp#L628