Removing duplicate & replacing with new contrast checker

Pa11y testing results

``` > pa11y-ci:sitemap > pa11y-ci --sitemap http://127.0.0.1:4000/sitemap.xml --sitemap-find https://accessibility.civicactions.com --sitemap-replace http://127.0.0.1:4000 --sitemap-exclude "/*.pdf" Running Pa11y on 127 URLs: > http://localhost:4000/guide/champions-program - 0 errors > http://localhost:4000/guide/design - 0 errors > http://localhost:4000/guide/documents - 0 errors > http://localhost:4000/guide/events - 0 errors > http://localhost:4000/guide/glossary - 0 errors > http://localhost:4000/guide/history - 0 errors > http://localhost:4000/guide/identity-language - 0 errors > http://localhost:4000/guide/introduction - 0 errors > http://localhost:4000/guide/onboarding-staff - 0 errors > http://localhost:4000/guide/organizations - 0 errors > http://localhost:4000/guide/plain-language - 0 errors > http://localhost:4000/guide/resources - 0 errors > http://localhost:4000/guide/semantic-html - 0 errors > http://localhost:4000/guide/social-media - 0 errors > http://localhost:4000/guide/tools - 0 errors > http://localhost:4000/guide/training - 0 errors > http://localhost:4000/about/people/allison-carroll - 0 errors > http://localhost:4000/about/people/civicactions - 0 errors > http://localhost:4000/about/people/daniel-mundra - 0 errors > http://localhost:4000/about/people/jack-haas - 0 errors > http://localhost:4000/about/people/jennifer-houde - 0 errors > http://localhost:4000/about/people/jonathan-bourland - 0 errors > http://localhost:4000/about/people/luke-fretwell - 0 errors > http://localhost:4000/about/people/michelle-kang - 0 errors > http://localhost:4000/about/people/mike-gifford - 0 errors > http://localhost:4000/about/people/nira-datta - 0 errors > http://localhost:4000/about/people/vanessa-luxen - 0 errors > http://localhost:4000/personas/accessibility-avery - 0 errors > http://localhost:4000/personas/designer-darcy - 0 errors > http://localhost:4000/personas/engineer-emery - 0 errors > http://localhost:4000/personas/procurement-parker - 0 errors > http://localhost:4000/personas/qa-quincy - 0 errors > http://localhost:4000/personas/remote-raz - 0 errors > http://localhost:4000/playbook/AT - 0 errors > http://localhost:4000/playbook/ai-and-ia - 0 errors > http://localhost:4000/playbook/authoring - 0 errors > http://localhost:4000/playbook/automated-testing - 0 errors > http://localhost:4000/playbook/checklists - 0 errors > http://localhost:4000/playbook/community - 0 errors > http://localhost:4000/playbook/distributed-teams - 0 errors > http://localhost:4000/playbook/documents - 0 errors > http://localhost:4000/playbook/follow-global-initiatives - 0 errors > http://localhost:4000/playbook/manual-testing - 0 errors > http://localhost:4000/playbook/personalization - 0 errors > http://localhost:4000/playbook/practice - 0 errors > http://localhost:4000/playbook/pwd - 0 errors > http://localhost:4000/playbook/roles - 0 errors > http://localhost:4000/playbook/statements - 0 errors > http://localhost:4000/playbook/training - 0 errors > http://localhost:4000/posts/4-ways-to-improve-government-accessibility-through-open-source - 0 errors > http://localhost:4000/posts/hello-world - 0 errors > http://localhost:4000/posts/whitehouse.gov-beginning-an-accessibility-journey - 0 errors > http://localhost:4000/posts/gcn-accessibility-compliance-as-code - 0 errors > http://localhost:4000/posts/improve-government-accessibility-through-open-source - 0 errors > http://localhost:4000/posts/govtech-how-will-biden-transform-government-website-accessibility - 0 errors > http://localhost:4000/posts/automated-accessibility-testing-leveraging-github-actions-and-pa11y-ci-with-axe - 0 errors > http://localhost:4000/posts/government-accessibility-and-the-cms-problem - 0 errors > http://localhost:4000/posts/at-banter-podcast - 0 errors > http://localhost:4000/posts/mvp-playbook - 0 errors > http://localhost:4000/posts/mvp-guide - 0 errors > http://localhost:4000/posts/smashingmag-baking-in-accessibility-testing - 0 errors > http://localhost:4000/posts/qa-with-mike-gifford-accessibility-in-civic-tech - 0 errors > http://localhost:4000/posts/launching-a-community-of-practice-for-accessibility-in-government-services - 0 errors > http://localhost:4000/posts/pre-GAAD-Authoring-Tools-Built-in-Accessibility - 0 errors > http://localhost:4000/posts/website-analytics - 0 errors > http://localhost:4000/posts/how-we-scale-inclusive-website-content-with-automated-testing-and-open-source-tools - 0 errors > http://localhost:4000/posts/social-media-accessibility-guide - 0 errors > http://localhost:4000/posts/plain-language-accessibility-guide - 0 errors > http://localhost:4000/posts/heart-accessibility - 0 errors > http://localhost:4000/posts/scanning-over-two-million-gov-pages - 0 errors > http://localhost:4000/posts/gsa-machine-readable-acr - 0 errors > http://localhost:4000/posts/CivicActions-Creates-Open-Product-Accessibility-Template - 0 errors > http://localhost:4000/posts/how-drupal-helps-us-bake-accessibility-into-every-project - 0 errors > http://localhost:4000/posts/CivicActions-Accessibility-Pledge - 0 errors > http://localhost:4000/posts/Talking-Drupal-Podcast - 0 errors > http://localhost:4000/posts/Talking-Drupal-Podcast-382 - 0 errors > http://localhost:4000/posts/governments-accessibility-opensource - 0 errors > http://localhost:4000/posts/FOSDEM-ccessibility-OpenSource - 0 errors > http://localhost:4000/posts/opensource-automated-accessibility-testing - 0 errors > http://localhost:4000/posts/helping-disabled-veterans-check-in-designing-an-accessibility-map - 0 errors > http://localhost:4000/posts/daniel-mundra-diving-into-drupal - 0 errors > http://localhost:4000/posts/how-omb-can-improve-gov-accessibility - 0 errors > http://localhost:4000/posts/fix-accessibility-bugs - 0 errors > http://localhost:4000/posts/five-reasons-to-get-excited-about-governmentwide-section-508-assessment-criteria - 0 errors > http://localhost:4000/projects/drupal - 0 errors > http://localhost:4000/projects/uswds-color - 0 errors > http://localhost:4000/projects/uswds - 0 errors > http://localhost:4000/roles/content-designer - 0 errors > http://localhost:4000/roles/developer - 0 errors > http://localhost:4000/roles/executive - 0 errors > http://localhost:4000/roles/operations - 0 errors > http://localhost:4000/roles/procurement - 0 errors > http://localhost:4000/roles/product-manager - 0 errors > http://localhost:4000/roles/project-manager - 0 errors > http://localhost:4000/roles/ux-designer - 0 errors > http://localhost:4000/topics/design - 0 errors > http://localhost:4000/topics/disability-type - 0 errors > http://localhost:4000/topics/process-policies - 0 errors > http://localhost:4000/topics/roles - 0 errors > http://localhost:4000/topics/testing - 0 errors > http://localhost:4000/topics/tools - 0 errors > http://localhost:4000/about/ - 0 errors > http://localhost:4000/accessibility - 0 errors > http://localhost:4000/agile - 0 errors > http://localhost:4000/analytics - 0 errors > http://localhost:4000/calendar - 0 errors > http://localhost:4000/colophon - 0 errors > http://localhost:4000/conduct - 0 errors > http://localhost:4000/about/contact - 0 errors > http://localhost:4000/guide/ - 0 errors > http://localhost:4000/heart - 0 errors > http://localhost:4000/help - 0 errors > http://localhost:4000/ - 0 errors > http://localhost:4000/news/ - 0 errors > http://localhost:4000/about/join - 0 errors > http://localhost:4000/license - 0 errors > http://localhost:4000/okrs - 0 errors > http://localhost:4000/open - 0 errors > http://localhost:4000/about/people/ - 0 errors > http://localhost:4000/personas/ - 0 errors > http://localhost:4000/playbook/ - 0 errors > http://localhost:4000/projects/ - 0 errors > http://localhost:4000/roles/ - 0 errors > http://localhost:4000/search - 0 errors > http://localhost:4000/services - 0 errors > http://localhost:4000/topics/ - 0 errors > http://localhost:4000/VPAT/Drupal9AccessibilityConformanceReport-December2020.html - 0 errors ✔ 127/127 URLs passed ```

CivicActions / accessibility

Removing duplicate & replacing with new contrast checker #721

Cypress Test Results