remove plugin gutentags

I rarely use it.

core/plugins.vim

@@ -133,14 +133,6 @@ if g:is_win || g:is_mac
   xmap ob <Plug>(openbrowser-smart-search)
 endif
 
-""""""""""""""""""""""""""" gutentags settings """"""""""""""""""""""""""""""
-" The path to store tags files, instead of in the project root.
-let g:gutentags_cache_dir = stdpath('cache') . '/ctags'
-let g:gutentags_ctags_extra_args = ['--fields=+niazS', '--extra=+q']
-let g:gutentags_ctags_extra_args += ['--c++-kinds=+px']
-let g:gutentags_ctags_extra_args += ['--c-kinds=+px']
-let g:gutentags_ctags_exclude = ['*.md', '*.html', '*.json', '*.toml', '*.css', '*.js',]
-
 """"""""""""""""""""""""""" vista settings """"""""""""""""""""""""""""""""""
 let g:vista#renderer#icons = {
       \ 'member': '',

docs/README.md

@@ -78,7 +78,7 @@ and make sure you can call `git` from the command line.
 
 ## ctags
 
-In order to use tags related plugins such as [vista.vim](https://github.com/liuchengxu/vista.vim) and [gutentags](https://github.com/ludovicchabant/vim-gutentags), we need to
+In order to use tags related plugins such as [vista.vim](https://github.com/liuchengxu/vista.vim), we need to
 install a ctags distribution. Universal-ctags is preferred.
 
 To install ctags on macOS, use [Homebrew](https://github.com/universal-ctags/homebrew-universal-ctags):

lua/plugins.lua

@@ -90,11 +90,11 @@ require("packer").startup({
     end
 
     use {
-      'nvim-telescope/telescope.nvim',
+      'nvim-telescope/telescope.nvim', cmd = 'Telescope',
       requires = { {'nvim-lua/plenary.nvim'} }
     }
     -- search emoji and other symbols
-    use 'nvim-telescope/telescope-symbols.nvim'
+    use {'nvim-telescope/telescope-symbols.nvim', after = 'telescope.nvim'}
 
     -- Another similar plugin is command-t
     -- use 'wincent/command-t'
@@ -150,8 +150,6 @@ require("packer").startup({
 
     -- Only install these plugins if ctags are installed on the system
     if utils.executable("ctags") then
-      -- plugin to manage your tags
-      use({"ludovicchabant/vim-gutentags", event = "VimEnter"})
       -- show file tags in vim window
       use({"liuchengxu/vista.vim", cmd = "Vista"})
     end
@@ -313,7 +311,12 @@ require("packer").startup({
     use({"gelguy/wilder.nvim", opt = true, setup = [[vim.cmd('packadd wilder.nvim')]]})
 
     -- showing keybindings
-    use {"folke/which-key.nvim", event = "VimEnter", config = [[require('config.which-key')]]}
+    use {"folke/which-key.nvim",
+    event = "VimEnter",
+    config = function()
+      vim.defer_fn(function() require('config.which-key') end, 2000)
+    end
+    }
 
     -- show and trim trailing whitespaces
     use {'jdhao/whitespace.nvim', event = 'VimEnter'}