Remove dependency list alerts

What does this MR do and why?

The "dependency list incomplete" alert is dead code because we never return this status. The "dependecy list job failed" alert should not be shown, because we still ingest reports from failed pipelines.

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ee/app/assets/javascripts/dependencies/components/app.vue

@@ -8,7 +8,6 @@ import {
   GlLink,
   GlTooltipDirective,
 } from '@gitlab/ui';
-
 // eslint-disable-next-line no-restricted-imports
 import { mapActions, mapGetters, mapState } from 'vuex';
 import { __, s__ } from '~/locale';