Device plugin requires no permissions, so remove from documentaion

The docs for the cordova-plugin-device plugin (http://cordova.apache.org/docs/en/edge/cordova_device_device.md.html#Device) say that the plugin will add
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
to AndroidManifest.xml

However, it seems like this is not actually the case, because 1) there is nothing in the plugin.xml file that would do this (missing <config-file target="AndroidManifest.xml" parent="/*">[...]) element, and 2) it doesn't seem like the device functionality needs this permission at all.

Unless there are some strange dependencies that I'm not seeing between other plugins that require the device plugin to have this permission (that wouldn't make sense...?), I think the docs should be edited to reflect this to avoid causing confusion (it confused me at least!)