How to delete a keymap?

[Aman9das]

  {
    "quarto-dev/quarto-nvim",
    opts = {
      lspFeatures = {
        languages = { "r", "python", "julia", "bash", "html", "lua" },
      },
      codeRunner = {
        enabled = true,
        default_method = "slime", -- "molten" or "slime"
      },
      keymap = {
        rename = "<leader>lG",
        format = nil,
      }
    },
  }

I can change the rename keymap but the format keymap isn't getting deleted. Am new to Neovim.

Similar to: jmbuhr/otter.nvim#71

[jmbuhr]

I made some changes and now you can disable all keymaps by setting keymap to false, or disable individual ones by setting them to false. Setting the nil will not disable it but rather use the default due to the way I merge the default with the user config.