web: remove unused account store

[Thykof]

Delivery Quality Checklist

• [ ] Breaking Changes in API: Does this PR introduce breaking changes in the API?

  • If yes, have you considered making it backward compatible?
  • If backward compatibility is not considered, set the "breaking-change" label.

• [ ] Changelog:

  • [ ] For bugfix PR, set the "bugfix" label
  • [ ] If this change should not appear in changelog, use "ignore-for-changelog" label

• [ ] Version Update Handling: Have you ensured that the version update by user is handled correctly?

• [ ] PR Dependency: Does this PR depend on another PR?

  • If yes, is it necessary for the dependency to be released prior to merging this one?

• [ ] Documentation:

  • [ ] Are any necessary changes made to user-facing documentation?
  • [ ] Confirm that API documentation is updated with any relevant changes.
  • [ ] Check that README and other documentation files are accurate and current.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (ce065ec) 22.28% compared to head (475f6c4) 22.09%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1313 +/- ## ========================================== - Coverage 22.28% 22.09% -0.19% ========================================== Files 28 29 +1 Lines 1701 1715 +14 ========================================== Hits 379 379 - Misses 1312 1326 +14 Partials 10 10 ```

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