chore(nvim): Remove unused util-functions

- Remove relic of effort to force neovim in vs-code
- Remove util functions copied from LazyNvim - if I need them I'll write
  them
- Removed Lua code comments I don't understand
- Better code comments

common/.config/nvim/lua/plugins/code-testing.lua

@@ -3,7 +3,6 @@ return {
     -- Taken from LazyVim
     {
         "nvim-neotest/neotest",
-        cond = require("config.util").is_not_vscode(),
         dependencies = {
             "nvim-neotest/nvim-nio",
             "nvim-lua/plenary.nvim",
@@ -43,8 +42,6 @@ return {
 
             if require("lazy.core.config").spec.plugins["trouble.nvim"] ~= nil then
                 opts.consumers = opts.consumers or {}
-                -- Refresh and auto close trouble after running tests
-                ---@type neotest.Consumer
                 opts.consumers.trouble = function(client)
                     client.listeners.results = function(adapter_id, results, partial)
                         if partial then