remove: "Open Source" section (#540)

As mentioned in #539 we will no longer have this section. Any project that UTILIZES Tailwind CSS but isn't a resource FOR Tailwind CSS can submit to the official [Showcase](https://tailwindcss.com/showcase)

.github/CONTRIBUTING.md

@@ -71,10 +71,6 @@ This category must contain UI libraries made for Tailwind CSS, as well as standa
 
 This category contains boilerplates projects, starters projects and tools made for using Tailwind CSS as well as tool themes made for Tailwind CSS.
 
-## Open-Source Projects
-
-Open-source projects that use Tailwind CSS can be featured in this category if you feel that it is awesome enough. Please don't add newly-created projects, and wait for them to get sort of popular before sending your pull request.
-
 ## Learning
 
 Anything that is a material that can be used to better understand Tailwind CSS can be added here. Awesome blog posts, code samples, tutorials on any platform are welcome.

README.md

@@ -32,7 +32,6 @@
 - [Tools](#tools)
 - [UI Libraries, Components & Templates](#ui-libraries-components--templates)
 - [Starters & Themes](#starters--themes)
-- [Open-Source Projects](#open-source-projects)
 - [Learning](#learning)
 
 ## Useful Links
@@ -386,17 +385,6 @@
 - 🚀 [Angular-Tailwind](https://github.com/luciano-work/angular-tailwind) - Dashboard starter kit using Angular and Tailwind CSS.
 - 🚀 [Vue-Resume](https://github.com/luciano-work/vue-resume) - Developer resume template with Tailwind CSS and Vue.
 
-## Open-Source Projects
-
-- [Goodwork](https://github.com/iluminar/goodwork) - Project Management & Collaboration tool.
-- [Todolist](https://github.com/guillaumebriday/todolist-frontend-vuejs) - To-do list application using Tailwind CSS.
-- [LeagueStats](https://github.com/vkaelin/LeagueStats) - Statistics website for League of Legends players.
-- [SapperCommerce](https://github.com/itswadesh/sapper-ecommerce) - E-commerce storefront using Svelte & Tailwind CSS.
-- [Misiki Books](https://github.com/itswadesh/misiki-books) - Book shop using Vue + Moltin + Tailwind CSS.
-- [Ubuntu 20.04](https://github.com/vivek9patel/vivek9patel.github.io) - An Ubuntu desktop using React.js + Tailwind CSS.
-- [Angular Spotify](https://github.com/trungk18/angular-spotify) - Spotify client built with Angular, Nx Workspace and Tailwind CSS.
-- [GitProfile](https://github.com/arifszn/gitprofile) - Automatic portfolio builder based on GitHub profiles, built with React.js and Tailwind CSS.
-
 ## Learning
 
 **Legend**: 💙 Official resource · 🧪 Sample · 🔧 Setup Tutorial · 🎬 Video Tutorial · 🎓 Component or Page Tutorial · 🎥 Cast