Remove wasapiComboBox from advanced settings (#17679)
gui.settingsDialogs.AdvancedPanelControls.wasapiComboBox has been removed
However, it's used when trying to restore advanced settings to defaults, making this feature unusable.
Description of user facing changes
None.
Description of development approach
Search for wasapi insource/gui/settingsDialogs.py and remove unused symbols.
Testing strategy:
Tested locally and checked that advanced settings can be restored to defaults.
