fix(sveltekit): rm redundant csrf check

[ndom91]

☕️ Reasoning

• Removes the additional request to get a csrfToken before attempting signIn or signOut client actions
• Drops the skipCSRFCheck we were already adding in the actions signIn/signOut methods, since we're putting it on the whole config by default now, passing it here was redundant.
• SvelteKit has built-in origin checking, making an additional csrf check redundant
• Removes a TODO

🧢 Checklist

• Documentation
• Tests
• Ready to be merged

🎫 Affected issues

📌 Resources

• Security guidelines
• Contributing guidelines
• Code of conduct
• Contributing to Open Source

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
auth-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 2, 2024 4:26am

2 Ignored Deployments

Name	Status	Preview	Comments	Updated (UTC)
next-auth-docs	⬜️ Ignored (Inspect)	Visit Preview		Jun 2, 2024 4:26am
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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 40.77%. Comparing base (577b7f9) to head (f128b5e).

Files	Patch %	Lines
packages/frameworks-sveltekit/src/lib/actions.ts	0.00%	3 Missing ⚠️
packages/frameworks-sveltekit/src/lib/env.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10963      +/-   ##
==========================================
+ Coverage   40.75%   40.77%   +0.02%     
==========================================
  Files         177      177              
  Lines       28038    28022      -16     
  Branches     1238     1244       +6     
==========================================
  Hits        11426    11426              
+ Misses      16612    16596      -16     

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