refactor(emmylua): centralize config in .emmyrc.json

after/lsp/emmylua_ls.lua

@@ -2,13 +2,6 @@
 return {
     settings = {
         emmylua = {
-            diagnostics = {
-                disable = {
-                    "unnecessary-if",
-                    "preferred-local-alias",
-                    "redefined-local",
-                },
-            },
             format = {
                 -- Re-enable once luafmt is integrated in server
                 -- useDiff = true,
@@ -18,33 +11,6 @@ return {
             },
         },
     },
-    ---@param config vim.lsp.ClientConfig
-    before_init = function(_, config)
-        ---@param path string|string[]
-        ---@return string?
-        local function realpath(path)
-            ---@type string?
-            local p
-            if type(path) == "table" then
-                p = path[1]
-            else
-                p = path
-            end
-            return p and vim.uv.fs_realpath(p) or p
-        end
-        local config_root = realpath(vim.fn.stdpath("config"))
-        local folder = config.workspace_folders and config.workspace_folders[1]
-        local root = config.root_dir or (folder and folder.name)
-        if root and realpath(root) == config_root then
-            local lib = { vim.env.VIMRUNTIME }
-            vim.list_extend(lib, require("pack").get_paths())
-            ---@cast config.settings table
-            config.settings.emmylua =
-                vim.tbl_deep_extend("force", config.settings.emmylua or {}, {
-                    workspace = { library = lib },
-                })
-        end
-    end,
     on_attach = function(_, bufnr)
         local util = require("util")