Do not consider attributes using the :unless option as required

Remove some of the factories introduced in commit 66334b5 as now we do
not need them anymore.

Co-Authored-By: Javi Martín <35156+javierm@users.noreply.github.com>

spec/models/concerns/globalizable.rb

@@ -13,9 +13,6 @@ shared_examples_for "globalizable" do |factory_name|
   let(:attribute) { required_fields.sample || fields.sample }
 
   before do
-    if factory_name == :budget || factory_name == :budget_phase
-      record.main_link_url = "https://consulproject.org"
-    end
     record.update!(attribute => "In English")
 
     I18n.with_locale(:es) do