[PM-17530] delete obsolete registration component

[alec-livefront]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-17530?atlOrigin=eyJpIjoiMDBjYjYzM2FjZjBjNGY5ZGE3NWUyZDM4MTk1YTI3MGIiLCJwIjoiaiJ9

📔 Objective

Removes old registration components. Also includes changes from #12862

⏰ 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

[github-actions]

Checkmarx One – Scan Summary & Details – d4f21f6c-9a3d-4fca-bcad-9ec28def91a9

Great job, no security vulnerabilities found in this Pull Request

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.

Project coverage is 35.50%. Comparing base (4936e6a) to head (5221479).

Files with missing lines	Patch %	Lines
...er/secrets-manager-trial-paid-stepper.component.ts	0.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #13181      +/-   ##
==========================================
- Coverage   35.50%   35.50%   -0.01%     
==========================================
  Files        3007     3001       -6     
  Lines       90887    90459     -428     
  Branches    16906    16786     -120     
==========================================
- Hits        32267    32114     -153     
+ Misses      56118    55882     -236     
+ Partials     2502     2463      -39     

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