Fix flygrep detach script

.ci/detach_plugin.sh

@@ -48,63 +48,7 @@ main () {
             _detect autoload/SpaceVim/mapping/search.vim
             _detect autoload/SpaceVim/logger.vim
             _detect syntax/SpaceVimFlyGrep.vim
-            cat <<EOT > README.md
+            _default_readme "FlyGrep.vim" "Grep on the fly in Vim/Neovim"
-
-# FlyGrep.vim
-> Asynchronously fly grep in vim
-
-This plugin is automatically detach from [SpaceVim](https://github.com/SpaceVim/SpaceVim/). you can use it without SpaceVim.
-
-![searching project](https://user-images.githubusercontent.com/13142418/35278709-7856ed62-0010-11e8-8b1e-e6cc6374b0dc.gif)
-
-## Install
-
-for dein.vim
-
-```vim
-call dein#add('wsdjeg/FlyGrep.vim')
-```
-
-for vim-plug
-
-```vim
-Plug 'wsdjeg/FlyGrep.vim'
-```
-
-## usage
-
-```
-:FlyGrep
-```
-
-you also can define custom mapping, for example:
-
-```vim
-nnoremap <Space>s/ :FlyGrep<cr>
-```
-
-Key Binding |	Description
------------| -----------
-`SPC s /` | Searching in project on the fly with default tools
-
-key binding in FlyGrep buffer:
-
-Key Binding |	Description
------------| -----------
-`<Esc>` | close FlyGrep buffer
-`<C-c>` | close FlyGrep buffer
-`<Enter>` | open file at the cursor line
-`<Tab>` | move cursor line down
-`<C-j>` | move cursor line down
-`<S-Tab>` | move cursor line up
-`<C-k>` | move cursor line up
-`<Bs>` | remove last character
-`<C-w>` | remove the Word before the cursor
-`<C-u>` | remove the Line before the cursor
-`<C-k>` | remove the Line after the cursor
-`<C-a>`/`<Home>` | Go to the beginning of the line
-`<C-e>`/`<End>` | Go to the end of the line
-EOT
             _detect LICENSE
             _checkdir plugin
             cat <<EOT > plugin/FlyGrep.vim
@@ -139,11 +83,7 @@ let g:FlyGrep_input_delay = 500
 " A list of searching tools will be userd.
 let g:FlyGrep_search_tools = ['ag', 'rg', 'grep', 'pt', 'ack']
 
-let g:spacevim_data_dir
+let g:spacevim_data_dir = '~/.cache'
-      \ = $XDG_CACHE_HOME != ''
-      \   ? $XDG_CACHE_HOME . SpaceVim#api#import('file').separator
-      \   : expand($HOME. join(['', '.cache', ''],
-      \     SpaceVim#api#import('file').separator))
 
 ""
 " Enable FlyGrep statusline