fix experience errors when window.Fides isn't present

[gilluminate]

Closes LJ-711

Description Of Changes

Part of the clean up function was setting window.Fides to null. This creates a race condition where sometimes the rest of the cleanup hasn't taken place yet, or the new iteration hasn't been created yet and the assumption of the code at that time is that window.Fides exists. At any rate, setting that to null was a bit overkill for the cleanup anyway, let's just remove it for now.

Code Changes

• remove setting window.Fides to null in the fides-preview script

Steps to Confirm

1. Save a TCF experience a few times in Admin UI

Pre-Merge Checklist

• Issue requirements met
• All CI pipelines succeeded
• CHANGELOG.md updated
  • Add a db-migration This indicates that a change includes a database migration label to the entry if your change includes a DB migration
  • Add a high-risk This issue suggests changes that have a high-probability of breaking existing code label to the entry if your change includes a high-risk change (i.e. potential for performance impact or unexpected regression) that should be flagged
  • Updates unreleased work already in Changelog, no new entry necessary
• Followup issues:
  • Followup issues created
  • No followup issues
• Database migrations:
  • Ensure that your downrev is up to date with the latest revision on main
  • Ensure that your downgrade() migration is correct and works
    • If a downgrade migration is not possible for this change, please call this out in the PR description!
  • No migrations
• Documentation:
  • Documentation complete, PR opened in fidesdocs
  • Documentation issue created in fidesdocs
  • If there are any new client scopes created as part of the pull request, remember to update public-facing documentation that references our scope registry
  • No documentation updates required

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[cypress]

fides    Run #12867

Run Properties:   Passed #12867  •  a958bde621: fix experience errors when window.Fides isn't present (#6084)

Project	fides
Branch Review	main
Run status	Passed #12867
Run duration	00m 50s
Commit	a958bde621: fix experience errors when window.Fides isn't present (#6084)
Committer	Jason Gill
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