Replace alert with GlAlert for erased_block.vue

In app/assets/javascripts/jobs/components/erased_block.vue we are using CSS classes to display an alert. We should use GlAlert with the correct warning alert color.

While we are here in this component we should:

  • remove .js-build-erased class as it does not seem to be used. (double-check)
  • remove .erased class as it does not seem to be used. (double-check)

Screen_Shot_2021-01-28_at_9.50.39_AM

Edited by Payton Burdette