[Cleanup]: Unused code as part of disable wizard tour

[chaitanyapotti]

What is this about?

To address issue https://github.com/MetaMask/MetaMask-planning/issues/4086 , onboarding wizard is disabled from the wallet home screen.
Another PR will be added to remove all related logic and state

We will create a new PR to remove the logic, unused code/state and metrics

Scenario

No response

Design

No response

Technical Details

No response

Threat Modeling Framework

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Acceptance Criteria

No response

Stakeholder review needed before the work gets merged

• Engineering (needed in most cases)
• Design
• Product
• QA (automation tests are required to pass before merging PRs but not all changes are covered by automation tests - please review if QA is needed beyond automation tests)
• Security
• Legal
• Marketing
• Management (please specify)
• Other (please specify)

References

#15840