Disable formatting prompt

[bryanforbes]

I'm currently using lua-language-server for diagnostics and diagnosticls to format with stylua in neovim. I followed the docs to disable formatting for lua-language-server, but when I run vim.lsp.buf.formatting_sync(nil, 5000) I still get a prompt asking me which server I would like to run the formatting for. How do I disable this prompt? Here are my effective setup() calls for reference:

require('lspconfig').sumneko_lua.setup({
  settings = {
    Lua = {
      format = {
        enable = false,
      },
    },
  },
})

require('lspconfig').diagnosticls.setup({
  filetypes = { 'lua' },
  init_options = {
    formatFiletypes = {
      lua = { 'stylua' },
    },
    formatters = {
      stylua = {
        command = 'stylua',
        args = {
          '--stdin-filepath',
          '%filepath',
          '--search-parent-directories',
          '-',
        },
        requiredFiles = { '.stylua.toml' },
        rootPatterns = { '.stylua.toml' },
      },
    },
  },
})