nvim: plugins: Drop guile support

We added this to explore guix but lost interest. Also no time. Will only
explore racket if at all.

nvim/.config/nvim/after/plugin/conjure.vim

@@ -1 +0,0 @@
-let g:conjure#client#guile#socket#pipename = "/tmp/guile-repl.socket"

nvim/.config/nvim/lua/plugins.lua

@@ -136,17 +136,14 @@ local init = function ()
   use {
     'Olical/conjure',
     tag = 'v4.18.0',
-    ft = { 'fennel', 'racket', 'scheme', 'scheme.guile' }
+    ft = { 'fennel', 'racket', 'scheme' }
   }
   use {
     'guns/vim-sexp',
     'tpope/vim-sexp-mappings-for-regular-people',
-    ft = { 'fennel', 'racket', 'scheme', 'scheme.guile' }
+    ft = { 'fennel', 'racket', 'scheme' }
   }
   use 'wlangstroth/vim-racket'
-  use {
-    'https://gitlab.com/HiPhish/guile.vim'
-  }
   -- Other syntax highlighting support
   use 'georgewitteman/vim-fish'
   use 'inkarkat/SyntaxAttr.vim'