Stop using Jenkins CI on govuk_publishing_components
Stop using Jenkins CI on govuk_publishing_components

The govuk_publishing_components gem is being switched over to use GitHub Actions instead of Jenkins for CI. It's therefore no longer necessary for Jenkins to have a pipeline job defined for the `govuk_publishing_components` repository.

This change is a clean-up task following alphagov/govuk_publishing_components#2630

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet