Remove dead links (#398)

Author: kt3k

README.md

@@ -328,7 +328,6 @@ This list is a collection of the best Deno modules and resources.
 
 - [crux.land](https://crux.land/) - A free registry service meant for hosting small ( < 10kB) single deno scripts.
 - [Deno PKG](https://denopkg.com/) - An easier way to use code from GitHub in your Deno project.
-- [Denopkg.dev](https://denopkg.dev/) - Use any public/private repository from GitHub/GitLab in your Deno project.
 - [deno.land/x/](https://deno.land/x/) - The official 3rd party module registry.
 - [nest.land](https://nest.land) - An immutable, blockchain powered Deno package registry. 🥚
 
@@ -416,7 +415,6 @@ This list is a collection of the best Deno modules and resources.
 - [Create your first News CLI app using Deno](https://medium.com/javascript-in-plain-english/creating-your-first-news-cli-app-using-deno-e1470398c627)
 - [Continuous Integration with Deno](https://semaphoreci.com/blog/continuous-integration-with-deno)
 - [The Hidden Superpower of Deno: xeval](https://stefanbuck.com/blog/hidden-superpower-deno-xeval)
-- [Test coverage in Deno with Codecov and GitHub Actions](https://v1rtl.site/blog/coverage-in-deno)
 - Deno REST API with Oak Tutorial Series [0](https://www.robinwieruch.de/deno-tutorial), [1](https://www.robinwieruch.de/deno-oak), [2](https://www.robinwieruch.de/deno-oak-rest-api)
 - [Getting Started with Deno](https://sabe.io/tutorials/getting-started-with-deno)
 - [How to deploy a Deno app using Docker](https://sabe.io/tutorials/how-to-deploy-deno-app-docker)