不要なコールバック定義を削除。

Author: mikoto2000

autoload/vital/__vital__/System/AsyncProcess.vim

@@ -16,11 +16,8 @@ function! s:_vital_depends() abort
   return []
 endfunction
 
-function! s:nop_cb(_) abort
-endfunction
-
 if !s:is_nvim
-  " for Vim
+  " inner callbacks for Vim
   function! s:inner_out_cb(user_out_cb, ch, msg) abort
     call a:user_out_cb(a:msg)
   endfunction
@@ -33,7 +30,7 @@ if !s:is_nvim
     call a:user_err_cb(a:msg)
   endfunction
 else
-  " for Neovim
+  " inner callbacks for Neovim
   function! s:inner_out_cb(user_out_cb, job_id, data, event) abort
     for line in a:data
       if line !=# ''
@@ -58,9 +55,9 @@ endif
 " execute({command}, {options})
 "   {command} = string
 "   {options} = {
-"     out_cb: function(stdout_msg),
-"     err_cb: function(stderr_msg),
-"     exit_cb: function(exit_code),
+"     out_cb: function(stdout_msg), " call per line
+"     err_cb: function(stderr_msg), " call per line
+"     exit_cb: function(exit_code), " call on exit
 "   }
 function! s:execute(command, options) abort
   if !type(a:options) is s:TYPE_DICT