Remove paranoia deprecations

Cleanup paranoia related deprecated methods and code comments.

core/app/models/concerns/spree/adjustment_source.rb

@@ -9,7 +9,7 @@ def deals_with_adjustments_for_deleted_source
 
  # The following is deprecated. As source_type without a source_id isn't
  # much better than a source_id that doesn't exist. In Solidus itself the
- # relevant classes use `acts_as_paranoid` so it is useful to keep the
+ # relevant classes use `discard` so it is useful to keep the
  # source_id around.
  adjustments.
  joins(:order).

core/app/models/spree/product.rb

@@ -5,10 +5,6 @@ module Spree
  # variations, called variants. Product properties include description,
  # permalink, availability, shipping category, etc. that do not change by
  # variant.
- #
- # @note this model uses {https://github.com/radar/paranoia paranoia}.
- # +#destroy+ will only soft-destroy records and the default scope hides
- # soft-destroyed records using +WHERE deleted_at IS NULL+.
  class Product < Spree::Base
  extend FriendlyId
  friendly_id :slug_candidates, use: :history

core/lib/spree/core.rb

@@ -14,7 +14,6 @@
 require 'state_machines-activerecord'
 
 require 'spree/deprecation'
-require 'spree/paranoia_deprecations'
 
 # This is required because ActiveModel::Validations#invalid? conflicts with the
 # invalid state of a Payment. In the future this should be removed.

core/spec/models/spree/promotion/actions/create_adjustment_spec.rb

@@ -118,9 +118,4 @@
  subject { action.discard }
  it_should_behave_like "destroying adjustments from incomplete orders"
  end
-
- context "#paranoia_destroy" do
- subject { Spree::Deprecation.silence { action.paranoia_destroy } }
- it_should_behave_like "destroying adjustments from incomplete orders"
- end
 end

core/spec/models/spree/promotion/actions/create_item_adjustments_spec.rb

@@ -189,10 +189,5 @@ module Spree
  subject { action.discard }
  it_should_behave_like "destroying adjustments from incomplete orders"
  end
-
- describe "#paranoia_destroy" do
- subject { Spree::Deprecation.silence { action.paranoia_destroy } }
- it_should_behave_like "destroying adjustments from incomplete orders"
- end
  end
 end