[CST] Remove unused CSS classes

[jerekshoe]

Summary

Removing unused CSS classes from claims-status.scss that were updated in this PR

Related issue(s)

• Link to ticket created in va.gov-team repo
  [CST] Remove unused CSS classes va.gov-team#81718

Screenshots

.claim-list-item-container

.claim-list-item-header-old

.claim-list-item-header-v2

.event-date

.event-header

.event-header-icon

.event-title

.event-description

.claims-first-paragraph

.loading-message-center-spinner

.usa-input-error

.claims-list-sort*

.claims-breadcrumbs

What areas of the site does it impact?

Claim Status Tool

Acceptance criteria

Quality Assurance & Testing

• I fixed|updated|added unit tests and integration tests for each feature (if applicable).
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs
• Linting warnings have been addressed
• Documentation has been updated (link to documentation *if necessary)
• Screenshot of the developed feature is added
• Accessibility testing has been performed

Error Handling

• Browser console contains no warnings or errors.
• Events are being sent to the appropriate logging solution
• Feature/bug has a monitor built into Datadog or Grafana (if applicable)

Authentication

• Did you login to a local build and verify all authenticated routes work as expected with a test user

⚠️ Team Sites (only applies to modifications made to the VA.gov header) ⚠️

• The vets-website header does not contain any web-components
• I used the proxy-rewrite steps to test the injected header scenario
• I reached out in the #sitewide-public-websites Slack channel for questions

Requested Feedback

(OPTIONAL) What should the reviewers know in addition to the above. Is there anything specific you wish the reviewer to assist with. Do you have any concerns with this PR, why?

[samcoforma]

@jerekshoe thanks for including those search result screenshots, made this easier