simple PySide2 QWidgets app loads Qt5Qml.dll, it should not load

[yinkaisheng]

Hi
I'm using PySide2-5.12.0-5.12.0-cp35.cp36.cp37-none-win32.whl with python 3.7.2 on Windows 7 SP1 64Bit.
When I run the following code, a simple app only has a QPushButton.

import sys
from PySide2.QtWidgets import QApplication, QPushButton
from PySide2.QtCore import Slot

@Slot()
def say_hello():
    print("Button clicked, Hello!")

if __name__ == "__main__":
    app = QApplication(sys.argv)
    button = QPushButton("Click me")
    button.clicked.connect(say_hello)
    button.show()
    app.exec_()

Use ProcessHacker to see the process's modules.
I found that PySide2 loads Qt5Qml.dll and Qt5Network.dll.
Why PySide2 loads the 2 dlls? This demo doesn't use qml and network.
I think it shoud not load dlls that are not required.
It will increase the app installer size if I package the app.
PyQt5 doesn't have this issue.