Merge pull request #7000 from Matt-Yorkley/dead-code-tax-total

DCOTW: Order#tax_total

spec/models/spree/order/adjustments_spec.rb

@@ -16,13 +16,6 @@ describe Spree::Order do
         expect(order.ship_total).to eq 15
       end
     end
-
-    context "#tax_total" do
-      it "should return the correct amount" do
-        allow(order).to receive_message_chain :adjustments, tax: adjustments
-        expect(order.tax_total).to eq 15
-      end
-    end
   end
 
   context "line item adjustments" do