refactor test to not use send method

since dispatch method is not private
(#6192)

spec/models/account_deletion_spec.rb

@@ -42,12 +42,12 @@ describe AccountDeletion, :type => :model do
 
   describe '#dispatch' do
     it "sends the account deletion xml" do
-      ad_new.send(:dispatch)
+      ad_new.dispatch
     end
 
     it 'creates a public postzord' do
       expect(Postzord::Dispatcher::Public).to receive(:new).and_return(double.as_null_object)
-      ad_new.send(:dispatch)
+      ad_new.dispatch
     end
   end