MAI: Remove AddNVIDIATools migrator

[carterbox]

Description:

Removes the AddNVIDIAToolks migrator which is no longer needed.

Checklist:

• Pydantic model updated or no update needed

Cross-refs, links to issues, etc:

Closes #6488

Reverts #3883

[carterbox]

I believe these are the necessary updates to the pydantic model?

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.92%. Comparing base (1b9f2ba) to head (cb8cdac).

Files with missing lines	Patch %	Lines
conda_forge_tick/migrators/core.py	50.00%	2 Missing ⚠️

❌ Your patch check has failed because the patch coverage (66.66%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6493      +/-   ##
==========================================
+ Coverage   80.88%   80.92%   +0.03%     
==========================================
  Files         146      144       -2     
  Lines       17633    17508     -125     
==========================================
- Hits        14263    14168      -95     
+ Misses       3370     3340      -30     

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