nvim: Drop cabal format plugin

nvim/.config/nvim/after/ftplugin/cabal.lua

@@ -1 +0,0 @@
-vim.bo.commentstring = "-- %s"

nvim/.config/nvim/after/ftplugin/cabal/cabalfmt.vim

@@ -1,55 +0,0 @@
-" Taken from https://github.com/sdiehl/vim-cabalfmt
-
-if !exists("g:cabalfmt_command")
-  let g:cabalfmt_command = "cabal-fmt"
-endif
-
-if !exists("g:cabalfmt_options")
-  let g:cabalfmt_options = [""]
-endif
-
-function! s:OverwriteBuffer(output)
-  if &modifiable
-    let l:curw = winsaveview()
-    try | silent undojoin | catch | endtry
-    let splitted = split(a:output, '\n')
-    if line('$') > len(splitted)
-      execute len(splitted) .',$delete'
-    endif
-    call setline(1, splitted)
-    call winrestview(l:curw)
-  else
-    echom "Cannot write to non-modifiable buffer"
-  endif
-endfunction
-
-function! s:RunCabal()
-  if exists("bufname")
-    let output = system(g:cabalfmt_command . " " . join(g:cabalfmt_options, ' ') . " " . bufname("%"))
-  else
-    let stdin = join(getline(1, '$'), "\n")
-    let output = system(g:cabalfmt_command . " " . join(g:cabalfmt_options, ' '), stdin)
-  endif
-  if v:shell_error != 0
-    echom output
-  else
-    call s:OverwriteBuffer(output)
-    if exists("bufname")
-      write
-    endif
-  endif
-endfunction
-
-function! s:CabalHaskell()
-  if executable(g:cabalfmt_command)
-    call s:RunCabal()
-  else
-    echom "cabal-fmt executable not found"
-  endif
-endfunction
-
-function! RunCabal()
-  call s:CabalHaskell()
-endfunction
-
-nnoremap <buffer> <silent> gq :call RunCabal()<CR>