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/config/util.lua

@@ -98,69 +98,4 @@ local M = {
         },
     },
 }
-
-function M.is_not_vscode()
-    return not vim.g.vscode
-end
-
-function M.fg(name)
-    ---@type {foreground?:number}?
-    ---@diagnostic disable-next-line: deprecated
-    local hl = vim.api.nvim_get_hl and vim.api.nvim_get_hl(0, { name = name }) or vim.api.nvim_get_hl_by_name(name, true)
-    ---@diagnostic disable-next-line: undefined-field
-    local fg = hl and (hl.fg or hl.foreground)
-    return fg and { fg = string.format("#%06x", fg) } or nil
-end
-
----@param opts? lsp.Client.filter
-function M.get_clients(opts)
-    local ret = {} ---@type lsp.Client[]
-    if vim.lsp.get_clients then
-        ret = vim.lsp.get_clients(opts)
-    else
-        ---@diagnostic disable-next-line: deprecated
-        ret = vim.lsp.get_active_clients(opts)
-        if opts and opts.method then
-            ---@param client lsp.Client
-            ret = vim.tbl_filter(function(client)
-                return client.supports_method(opts.method, { bufnr = opts.bufnr })
-            end, ret)
-        end
-    end
-    return opts and opts.filter and vim.tbl_filter(opts.filter, ret) or ret
-end
-
----@param from string
----@param to string
-function M.on_rename(from, to)
-    local clients = M.get_clients()
-    for _, client in ipairs(clients) do
-        if client.supports_method("workspace/willRenameFiles") then
-            ---@diagnostic disable-next-line: invisible
-            local resp = client.request_sync("workspace/willRenameFiles", {
-                files = {
-                    {
-                        oldUri = vim.uri_from_fname(from),
-                        newUri = vim.uri_from_fname(to),
-                    },
-                },
-            }, 1000, 0)
-            if resp and resp.result ~= nil then
-                vim.lsp.util.apply_workspace_edit(resp.result, client.offset_encoding)
-            end
-        end
-    end
-end
-
----@param on_attach fun(client, buffer)
-function M.on_lsp_attach(on_attach)
-    vim.api.nvim_create_autocmd("LspAttach", {
-        callback = function(args)
-            local buffer = args.buf ---@type number
-            local client = vim.lsp.get_client_by_id(args.data.client_id)
-            on_attach(client, buffer)
-        end,
-    })
-end
-
 return M