Vim: remove coc from config

.vim/vimrc

@@ -22,8 +22,8 @@ call plug#begin('~/.vim/bundle')
 "Plug 'Shougo/neocomplete.vim'
 "Plug 'lyuts/vim-rtags'
 "Plug 'JBakamovic/cxxd-vim'
-Plug 'neoclide/coc.nvim', {'branch': 'release'}
+"Plug 'neoclide/coc.nvim', {'branch': 'release'}
-Plug 'jackguo380/vim-lsp-cxx-highlight'
+"Plug 'jackguo380/vim-lsp-cxx-highlight'
 " }}}
 
 " Mappings {{{
@@ -426,7 +426,6 @@ setglobal virtualedit=block
 setglobal shiftround
 
 set shortmess+=c
-inoremap <silent><expr> <leader><space> coc#refresh()
 set signcolumn=yes
 set cmdheight=2
 "inoremap <silent><expr> <TAB>
@@ -440,16 +439,6 @@ function! s:check_back_space() abort
 	return !col || getline('.')[col - 1]  =~# '\s'
 endfunction
 
-function! s:show_documentation()
-	if (index(['vim','help'], &filetype) >= 0)
-		execute 'h '.expand('<cword>')
-	else
-		call CocAction('doHover')
-	endif
-endfunction
-
-autocmd CursorHold * silent call CocActionAsync('highlight')
-
 "hi None ctermbg=None ctermfg=None
 
 let g:vim_search_pulse_mode = 'pattern'