LineageSettingsProvider: Don't set LINEAGE_SETUP_WIZARD_COMPLETED

*) This was initialized from Settings.Global.DEVICE_PROVISIONED and it is no
   longer possible to access system settings during provider startup since:
https://android.googlesource.com/platform/frameworks/base/+/235272a2165b694ca1d67e901aa2ef2ad86c35bc

*) LINEAGE_SETUP_WIZARD_COMPLETED has been deprecated since 14.1:
https://github.com/LineageOS/android_lineage-sdk/commit/797a45aa6948e9c0871e47160fd6768bababee80

*) We will later cleanup the unused setting during topic:pie-db-upgrade

Change-Id: I185648ca25995fae80362642d297573795d04bfa