📝 Remove Index that does not work anymore

Deno Doc changed behavior and local link does not work anymore.

Author: lambdalisue

denops_std/README.md

@@ -51,19 +51,3 @@ for more details.
 
 [deno]: https://deno.land/
 [denops.vim]: https://github.com/vim-denops/denops.vim
-
-## Index
-
-| Name                       | Description                                                            |
-| -------------------------- | ---------------------------------------------------------------------- |
-| [`anonymous`](./anonymous) | A module to provide anonymous function                                 |
-| [`argument`](./argument)   | A module to provide helper functions to manage Vim's command arguments |
-| [`autocmd`](./autocmd)     | A module to provide helper functions to manage `autocmd`               |
-| [`batch`](./batch)         | A module to provide wrapper functions of `denops.batch()`              |
-| [`buffer`](./buffer)       | A module to provide helper functions to manage buffers                 |
-| [`bufname`](./bufname)     | A module to provide helper functions to manage Vim's buffer name       |
-| [`function`](./function)   | A module to provide functions of Vim and Neovim native functions       |
-| [`helper`](./helper)       | A module to provide helper functions                                   |
-| [`mapping`](./mapping)     | A module to provide helper functions to manage mappings                |
-| [`option`](./option)       | A module to provide helper functions to manage options                 |
-| [`variable`](./variable)   | A module to provide helper accessor functions to variables             |