values-ru: Remove duplicated string resources

packages/apps/LineageParts/res/values-ru/strings.xml:551: error: duplicate value for resource 'string/wired_charging_sounds_title' with config 'ru'.
packages/apps/LineageParts/res/values-ru/strings.xml:554: error: duplicate value for resource 'string/charging_sounds_notification_category_title' with config 'ru'.
packages/apps/LineageParts/res/values-ru/strings.xml:555: error: duplicate value for resource 'string/wireless_charging_sounds_title' with config 'ru'.
packages/apps/LineageParts/res/values-ru/strings.xml: error: file failed to compile.

* Introduced in bc927efd
* But upstream later included these resources in 06dc39d0