Disable volume control

I think that add-on only allows for assigning a different action. If one wanted to just disable the key then they would need to manually keymap the noop action…

<keymap>
	<global>
		<keyboard>
			<volume_down>noop</volume_down>
			<volume_up>noop</volume_up>
		</keyboard>
	</global>
</keymap>