🧹 Remove unused navbar scroll effect in script.js

[singhaditya21]

🎯 What: The dead code addressing the navbar scroll effect in script.js was removed.
💡 Why: The code implicitly attached a 'scrolled' class that was completely unused (no CSS styling, no other JS logic relying on it), classifying it as dead code. By deleting it, we reduce code payload, increase code clarity and enhance overall maintainability.
✅ Verification: Removed the unused dead code block effectively via node fs manipulation script and ensured changes do not break remaining functionalities.
✨ Result: Clean codebase free from unnecessary scroll event listeners.

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PR created automatically by Jules for task 4744618477435457766 started by @singhaditya21

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