Remove the ci_config_feature_flag from spec config

spec/lib/gitlab/ci/config/feature_flags_spec.rb

spec/services/ci/create_pipeline_service/artifacts_spec.rb

spec/services/ci/create_pipeline_service/cache_spec.rb

...ate_pipeline_service/creation_errors_and_warnings_spec.rb

...ci/create_pipeline_service/cross_project_pipeline_spec.rb

.../ci/create_pipeline_service/custom_config_content_spec.rb

...vices/ci/create_pipeline_service/custom_yaml_tags_spec.rb

spec/services/ci/create_pipeline_service/dry_run_spec.rb

spec/services/ci/create_pipeline_service/environment_spec.rb

...s/ci/create_pipeline_service/evaluate_runner_tags_spec.rb

spec/services/ci/create_pipeline_service/include_spec.rb

...ices/ci/create_pipeline_service/limit_active_jobs_spec.rb

spec/services/ci/create_pipeline_service/logger_spec.rb

...ervices/ci/create_pipeline_service/merge_requests_spec.rb

spec/services/ci/create_pipeline_service/needs_spec.rb

spec/services/ci/create_pipeline_service/parallel_spec.rb

...ices/ci/create_pipeline_service/parameter_content_spec.rb

.../ci/create_pipeline_service/parent_child_pipeline_spec.rb

.../services/ci/create_pipeline_service/partitioning_spec.rb

...rvices/ci/create_pipeline_service/pre_post_stages_spec.rb