home: vim: remove 'vim-pandoc'

The tree-sitter code-block high-lighting is built-in and works better,
and I don't use any of the other features.

home/vim/default.nix

@@ -54,8 +54,6 @@ in
       vim-beancount
       vim-jsonnet
       vim-nix
-      vim-pandoc
-      vim-pandoc-syntax
       vim-toml
 
       # General enhancements

home/vim/plugin/settings/pandoc.vim

@@ -1,20 +0,0 @@
-" Which code-block languages should I expect to be high-lighted.
-let g:pandoc#syntax#codeblocks#embeds#langs=[
-  \     "bash=sh",
-  \     "c",
-  \     "cpp",
-  \     "go",
-  \     "haskell",
-  \     "python",
-  \     "rust",
-  \     "sh",
-  \     "vim",
-  \     "yaml",
-  \     "tex",
-  \     "toml",
-  \     "perl",
-  \     "json",
-  \     "latex=tex",
-  \     "make",
-  \     "makefile=make",
-  \ ]