nvim: init.vim: Remove gutentags

We will just fire a tag generation command ourselves with Neomake.
No need for gutentags. It isn't smart anyways to work for multiple
languages and doesn't work on repos like gst-build.

nvim/init.vim

@@ -39,7 +39,6 @@ Plug 'vim-utils/vim-husk'
 " Tags
 Plug 'sk1418/QFGrep'
 Plug 'steffanc/cscopemaps.vim', { 'for': 'c' }
-Plug 'ludovicchabant/vim-gutentags', { 'for': 'c' }
 Plug 'deoplete-plugins/deoplete-tag'
 " GDB
 Plug 'sakhnik/nvim-gdb', { 'do': ':UpdateRemotePlugins' }
@@ -248,7 +247,8 @@ nnoremap <Leader>ghu :GitGutterUndoHunk<CR>
 nnoremap <Leader>ghr :GitGutterPreviewHunk<CR>
 nnoremap <Leader>gqf :GitGutterQuickFix<CR>
 nnoremap <Leader>ggf :GitGutterFold<CR>
-" For Cscope
+" For Cscope & tags
+nnoremap <Leader>ct :NeomakeSh ctags -R .<CR>
 nnoremap <Leader>cu :NeomakeSh cscope -bqR<CR>
 nnoremap <Leader>cr :cs reset<CR>
 " For Neomake
@@ -471,24 +471,6 @@ call neomake#configure#automake({
 let g:neomake_open_list = 2
 let g:neomake_warning_sign = {'text': '?'}
 
-" gutentags configuration
-" https://www.reddit.com/r/vim/comments/d77t6j/guide_how_to_setup_ctags_with_gutentags_properly/
-let g:gutentags_add_default_project_roots = 0
-let g:gutentags_project_root = ['.git']
-let g:gutentags_cache_dir = expand('$HOME/.vim/tags/')
-
-let g:gutentags_generate_on_new = 1
-let g:gutentags_generate_on_missing = 1
-let g:gutentags_generate_on_write = 1
-let g:gutentags_generate_on_empty_buffer = 0
-
-let g:gutentags_ctags_extra_args = [
-      \ '--tag-relative=no',
-      \ '--fields=+ailmnS',
-      \ '--recurse',
-      \ '--if0=yes'
-      \ ]
-
 " Automatically detect style file and apply style to formatting
 let g:clang_format#detect_style_file = 1
 " Additional trigger not required with deoplete