Deprecated Cleanup

[wilwade]

• Review deprecated items
• Remove anything that has been deprecated for more than 6 months
• Remember to leave indexes the same for events, errors, and extrinsics
• Remove messages.MessagesStored as it is not used now

List of current deprecated items:

• instant seal node Docker
• cli instant-sealing, manual-sealing
• revoke_schema_permissions
• create_schema
• apply_item_actions_with_signature
• upsert_page_with_signature
• delete_page_with_signature
• ItemizedSignaturePayload
• PaginatedUpsertSignaturePayload
• PaginatedDeleteSignaturePayload