chore: remove unrefSubSchemas

[sidharthv96]

📑 Summary

Removes unrefSubSchemas as it was a cosmetic hack to reduce git diff changes.

📋 Tasks

Make sure you

• 📖 have read the contribution guidelines
• 💻 have added necessary unit/e2e tests.
• 📓 have added documentation. Make sure MERMAID_RELEASE_VERSION is used for all new features.
• 🔖 targeted develop branch

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 5.74%. Comparing base (4885b31) to head (c993adf).

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #5514      +/-   ##
==========================================
+ Coverage     5.72%   5.74%   +0.01%     
==========================================
  Files          278     277       -1     
  Lines        42046   41967      -79     
  Branches       490     515      +25     
==========================================
  Hits          2409    2409              
+ Misses       39637   39558      -79     

Flag	Coverage Δ
unit	5.74% <0.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
.../mermaid/scripts/create-types-from-json-schema.mts	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes