Simplify clangd command

lua/plugins/completions.lua

@@ -93,11 +93,7 @@ return {
         ['clangd'] = function()
           require('lspconfig').clangd.setup({
             capabilities = capabilities,
-            cmd = {
+            cmd = { 'clangd', '--completion-style=detailed' }
-              'clangd',
-              '--completion-style=detailed',
-              '--function-arg-placeholders=1',
-            }
           })
         end,