chore: remove mocha downloader from portfolio

packages/content/markdown/projects/mocha downloader.md

@@ -1,15 +0,0 @@
----
-name: Mocha Downloader
-overview: A cross-platform desktop download manager built with web technologies.
-image: /img/portfolio/mocha-downloader.avif
-repo: https://github.com/Mocha-Downloader
-badges:
-  - typescript
-  - react
-  - electron
----
-
-## Introduction
-
-Mocha Downloader is a cross-platform desktop download manager app built with
-web technologies.