[PM-25123] Remove VerifyBankAsync Code

[sbrown-livefront]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-25123

📔 Objective

Removes the unused verify bank request object since older verify bank code was removed in #16532

📸 Screenshots

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

Checkmarx One – Scan Summary & Details – 3c5ead52-3e1c-4f3d-a326-369adab8d045

Great job! No new security vulnerabilities introduced in this pull request

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 39.19%. Comparing base (d65824e) to head (65e1540).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #16923      +/-   ##
==========================================
- Coverage   39.20%   39.19%   -0.01%     
==========================================
  Files        3463     3462       -1     
  Lines       98126    98125       -1     
  Branches    14736    14736              
==========================================
- Hits        38469    38463       -6     
- Misses      57991    57997       +6     
+ Partials     1666     1665       -1     

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