Fix so clang receives the congifured parameters correctly.

home/.config/nvim/lua/language_servers/clangd.lua

@@ -82,7 +82,6 @@ local default_capabilities = {
 }
 
 return {
-    default_config = {
     cmd = {
         "clangd",
         "--background-index",         -- Enables background indexing
@@ -101,7 +100,6 @@ return {
         return util.root_pattern(unpack(root_files))(fname) or util.find_git_ancestor(fname)
     end,
     single_file_support = true,
-    },
     capabilities = default_capabilities,
     docs = {
         description = [[