Don't disable Container Registry for CI/CD projects

We should respect the default state from the application config for
these setting.

ee/app/services/ci_cd/setup_project.rb

@@ -12,7 +12,6 @@ module CiCd
 
     def update_project
       project.update_attributes(
-        container_registry_enabled:          false,
         mirror:                              true,
         mirror_trigger_builds:               true,
         mirror_overwrites_diverged_branches: true,

ee/spec/services/projects/setup_ci_cd_spec.rb

@@ -21,8 +21,6 @@ describe Projects::SetupCiCd do
 
     project_feature = project.project_feature
 
-    expect(project.container_registry_enabled).to be_falsey
-
     expect(project_feature).not_to be_issues_enabled
     expect(project_feature).not_to be_merge_requests_enabled
     expect(project_feature).not_to be_wiki_enabled