chore(prog/nvim): remove grep op

programs/nvim/plugins/grep-operator.vim

@@ -1,23 +0,0 @@
-nnoremap <leader>g :set operatorfunc=<SID>GrepOperator<cr>g@
-vnoremap <leader>g :<c-u>call <SID>GrepOperator(visualmode())<cr>
-
-nnoremap <leader>cj :cnext<cr>
-nnoremap <leader>ck :cprev<cr>
-
-function! s:GrepOperator(type)
-  let saved_unnamed_register = @@
-
-  if a:type ==# 'v'
-    exe "normal! `<v`>y"
-  elseif a:type ==# 'char'
-    exe "normal! `[v`]y"
-  else
-    return
-  endif
-
-  silent exe ":grep! -R " . shellescape(@@) . " ."
-  copen
-
-  let @@ = saved_unnamed_register
-endfunction
-