Simplify tailwindcss-ls config (#502)

latest nvim-lspconfig has all the necessary config for tailwindcss included.

lua/lsp/tailwindcss-ls.lua

@@ -1,26 +1,9 @@
 local lspconfig = require 'lspconfig'
-local configs = require 'lspconfig/configs'
-local util = require"lspconfig".util
 
--- Check if tailwindls server already defined.
+lspconfig.tailwindcss.setup {
-if not lspconfig.tailwindls then configs['tailwindls'] = {default_config = {}} end
-
-lspconfig.tailwindls.setup {
     cmd = {
         "node", DATA_PATH .. "/lspinstall/tailwindcss/tailwindcss-intellisense/extension/dist/server/tailwindServer.js",
         "--stdio"
     },
-    filetypes = O.tailwindls.filetypes,
-    init_options = {
-        userLanguages = { -- I don't know why but the LSP won't autocomplete the tailwind classes without this
-        }
-    },
-    root_dir = function(fname)
-        return util.root_pattern('tailwind.config.js', 'tailwind.config.ts')(fname) or
-        util.root_pattern('postcss.config.js', 'postcss.config.ts')(fname) or
-        util.find_package_json_ancestor(fname) or
-        util.find_node_modules_ancestor(fname) or
-        util.find_git_ancestor(fname)
-    end,
     on_attach = require'lsp'.common_on_attach
 }