SEAB-5992: Remove Twitter from smoke tests

[ll5zh]

Description
Previously, due to conflicting contents in staging/prod (i.e. Mastodon widget) versus qa (i.e. Twitter widget), smoke tests had to include Twitter in order to pass (#1861). Now that 1.15 has been deployed, we can remove the Twitter checks.

Review Instructions
All additions of Twitter from #1861 should be removed, and smoke tests should succeed.

Issue
SEAB-5992

Security
If there are any concerns that require extra attention from the security team, highlight them here.

Please make sure that you've checked the following before submitting your pull request. Thanks!

• Check that your code compiles by running npm run build
• Ensure that the PR targets the correct branch. Check the milestone or fix version of the ticket.
• If this is the first time you're submitting a PR or even if you just need a refresher, consider reviewing our style guide
• Do not bypass Angular sanitization (bypassSecurityTrustHtml, etc.), or justify why you need to do so
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• If this PR is for a user-facing feature, create and link a documentation ticket for this feature (usually in the same milestone as the linked issue). Style points if you create a documentation PR directly and link that instead.
• Check whether this PR disables tests. If it legitimately needs to disable a test, create a new ticket to re-enable it in a specific milestone.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 40.33%. Comparing base (1724c09) to head (0785ade).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1947   +/-   ##
========================================
  Coverage    40.33%   40.33%           
========================================
  Files          400      400           
  Lines        11945    11945           
  Branches      2894     2894           
========================================
  Hits          4818     4818           
  Misses        4839     4839           
  Partials      2288     2288           

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