chore(nvim): remove Octo plugin

nvim/lua/plugins/octo.lua

@@ -1,13 +0,0 @@
--- Edit and review GitHub issues and pull requests
--- https://github.com/pwntester/octo.nvim
-return {
-  "pwntester/octo.nvim",
-  dependencies = {
-    "nvim-lua/plenary.nvim",
-    "nvim-telescope/telescope.nvim",
-    "nvim-tree/nvim-web-devicons",
-  },
-  config = function()
-    require("octo").setup()
-  end,
-}