Remove nvim-lua/completion-nvim

It's archived.

README.md

@@ -151,7 +151,6 @@ Neovim supports a wide variety of UI's.
 
 ### Completion
 
-- [nvim-lua/completion-nvim](https://github.com/nvim-lua/completion-nvim) - An async completion framework aims to provide completion to neovim's built in LSP written in Lua.
 - [hrsh7th/nvim-cmp](https://github.com/hrsh7th/nvim-cmp) - A completion plugin for neovim written in Lua. New version of nvim-compe.
 - [ms-jpq/coq_nvim](https://github.com/ms-jpq/coq_nvim) - Fast as FUCK nvim completion. SQLite, concurrent scheduler, hundreds of hours of optimization.
 - [jameshiew/nvim-magic](https://github.com/jameshiew/nvim-magic) - Framework for integrating AI code assistance.