Is background plugin illegal plugin?

i use background plugin for doing some processing while the app in background mode from here

appstore just reject my app and the replay was

Your app declares support for audio in the UIBackgroundModes key in your Info.plist but did not include features that require persistent audio.

Next Steps

The audio key is intended for use by apps that provide audible content to the user while in the background, such as music player or streaming audio apps. Please revise your app to provide audible content to the user while the app is in the background or remove the “audio” setting from the UIBackgroundModes key.

i’m didn’t use any audio plugin i just use phonegap-plugin-local-notification here
is phonegap-plugin-local-notification use sound ?
and if yes can i disable this sound ?
if no what a solution for this situation ?

(Links to the plugins you are talking about might help - also if you use an Ionic Native wrapper)