vim: Stop using vim-online-thesaurus.

It stopped working, see
beloglazov/vim-online-thesaurus#43.

vim/.vimrc

@@ -716,12 +716,6 @@ let g:CommandTCancelMap=['<Esc>', '<C-c>'] " Keys to close the search window.
 " ---------------------------------------------------------
 let g:sort_motion_flags = 'u' " Remove duplicates while sorting.
 
-" --------------------------------------------------------------
-" vim-online-thesaurus: Looking up words in an online thesaurus.
-" --------------------------------------------------------------
-let g:online_thesaurus_map_keys = 0 " Disable default key maps.
-nnoremap <Leader>ot :OnlineThesaurusCurrentWord<CR>
-
 " -----------------------------------------------------
 " vim-mail-refs: Adding references when writing emails.
 " -----------------------------------------------------

vim/README.md

@@ -28,7 +28,6 @@ I use the following Vim plugins, which you can install by using
   * [vim-bracketed-paste](https://github.com/ConradIrwin/vim-bracketed-paste) - Handles bracketed-paste-mode (aka automatic `:set paste`).
   * [vim-grepper](https://github.com/mhinz/vim-grepper) - A convenient wrapper around grepping facilities in Vim.
   * [vim-indent-object](https://github.com/michaeljsmith/vim-indent-object) - Adds a text object representing lines with the same indent.
-  * [vim-online-thesaurus](https://github.com/beloglazov/vim-online-thesaurus) - Looking up words in an online thesaurus.
   * [vim-repeat](https://github.com/tpope/vim-repeat) - Enables repeating-supported plugin maps with `"."`.
   * [vim-sort-motion](https://github.com/christoomey/vim-sort-motion) - Adds a motion to sort text objects.
   * [vim-surround](https://github.com/tpope/vim-surround) - Quoting/parenthesizing made simple.