Delete arifa-hackathon-2025.png image file and update blog post reference

[Copilot]

This PR removes the arifa-hackathon-2025.png image file from the /assets/img/ directory as requested and updates the corresponding blog post to prevent broken image references.

Changes Made

• Deleted: /assets/img/arifa-hackathon-2025.png (3.6MB image file)
• Updated: _posts/2025-09-29-arifa-hackathon-2025-first-hackathon-experience.md to remove the image reference from the frontmatter

The blog post's frontmatter was updated from:

image: /assets/img/arifa-hackathon-2025.png

to:

image:

This follows the pattern used by other posts in the repository that have empty image fields, ensuring the Jekyll site continues to build and function properly without 404 errors or broken image links.

Verification

• ✅ Build process continues to work correctly (gulp build successful)
• ✅ No remaining references to the deleted image file exist in the codebase
• ✅ Site functionality preserved with clean removal of image dependency

Original prompt

On img, delete this file arenredd.github.io/assests/img/arifa-hackathon-2025.png

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