Delete dead code in CartController

The two conditionals in #populate_variant_attributes here are never actually true, so the subsequent code paths are never reached.

app/controllers/cart_controller.rb

@@ -20,8 +20,6 @@ class CartController < BaseController
       render json: { error: cart_service.errors.full_messages.join(",") },
              status: :precondition_failed
     end
-
-    populate_variant_attributes
   end
 
   private
@@ -40,26 +38,4 @@ class CartController < BaseController
       authorize! :create, Spree::Order
     end
   end
-
-  def populate_variant_attributes
-    order = current_order.reload
-
-    populate_variant_attributes_from_variant(order) if params.key? :variant_attributes
-    populate_variant_attributes_from_product(order) if params.key? :quantity
-  end
-
-  def populate_variant_attributes_from_variant(order)
-    params[:variant_attributes].each do |variant_id, attributes|
-      permitted = attributes.permit(:quantity, :max_quantity).to_h.with_indifferent_access
-      order.set_variant_attributes(Spree::Variant.find(variant_id), permitted)
-    end
-  end
-
-  def populate_variant_attributes_from_product(order)
-    params[:products].each do |_product_id, variant_id|
-      max_quantity = params[:max_quantity].to_i
-      order.set_variant_attributes(Spree::Variant.find(variant_id),
-                                   max_quantity: max_quantity)
-    end
-  end
 end

spec/controllers/cart_controller_spec.rb

@@ -110,7 +110,6 @@ describe CartController, type: :controller do
       order = subject.current_order(true)
       allow(order).to receive(:distributor) { distributor }
       allow(order).to receive(:order_cycle) { order_cycle }
-      expect(order).to receive(:set_variant_attributes).with(variant, max_quantity: "3")
       allow(controller).to receive(:current_order).and_return(order)
 
       expect do

spec/models/spree/order_spec.rb

@@ -468,11 +468,6 @@ describe Spree::Order do
       li = Spree::LineItem.last
       expect(li.max_quantity).to eq(3)
     end
-
-    it "does nothing when the line item is not found" do
-      p = build_stubbed(:simple_product)
-      subject.set_variant_attributes(p.master, { 'max_quantity' => '3' }.with_indifferent_access)
-    end
   end
 
   describe "applying enterprise fees" do