remove kcal demo link (dead link, no such domain)

- ref. https://github.com/awesome-selfhosted/awesome-selfhosted/issues/2266

README.md

@@ -1638,7 +1638,7 @@ Software and tools for managing [recipes](https://en.wikipedia.org/wiki/Recipe).
 
 - [Bar Assistant](https://github.com/karlomikus/bar-assistant) - Bar assistant is a self hosted application for managing your home bar. It allows you to add your ingredients, search for cocktails and create custom cocktail recipes. ([Demo](https://bar.karlomikus.com/)) `MIT` `PHP/Docker`
 - [Groceri.es](https://groceri.es/) - Web-based application to manage your recipes and plan your meals ahead. groceri.es keeps track of your menu plans and generates a groceries list for you. ([Source Code](https://github.com/juriansluiman/groceri.es)) `MIT` `Docker/Python`
-- [kcal](https://github.com/kcal-app/kcal) - Track nutritional information about foods and recipes, set goals, and record a food journal to help along the way. Kcal is a personal system that focuses on direct control of inputs and a minimal, easy to use recipe presentation for preparing meals. ([Demo](http://demo.kcal.cooking/login)) `MPL-2.0` `PHP`
+- [kcal](https://github.com/kcal-app/kcal) - Track nutritional information about foods and recipes, set goals, and record a food journal to help along the way. Kcal is a personal system that focuses on direct control of inputs and a minimal, easy to use recipe presentation for preparing meals. `MPL-2.0` `PHP`
 - [KitchenOwl](https://tombursch.github.io/kitchenowl/) - A cross-platform shopping list, recipe storage, expense tracker, and meal planner following the material design language. ([Source Code](https://github.com/TomBursch/kitchenowl)) `AGPL-3.0` `Docker`
 - [Mealie](https://hay-kot.github.io/mealie/) - Material design inspired recipe manager with category and tag management, shopping-lists, meal-planner, and site customizations. Mealie is focused on simple user interactions to keep the whole family using the app. ([Demo](https://mealie-demo.hay-kot.dev/), [Source Code](https://github.com/hay-kot/mealie)) `MIT` `Python`
 - [Recepturer](https://recepturer.com/) `⚠` - Let Recepturer help you organize all your recipes in one place. You can add, edit and delete recipes, and create meal plans. Simply type your recipe and all ingredients will be listed as you go. Data is stored on Dropbox. ([Source Code](https://github.com/sjoerdvanderhoorn/recepturer)) `MIT` `Javascript`