plugings: remove syntastic

- Removes syntastic as it is redundant with coc-vim.

Co-Authored-by: iGor milhit <igor.milhit@unige.ch>

init.vim

@@ -27,7 +27,6 @@ Plug 'tpope/vim-fugitive'                                                   " Gi
 Plug 'Xuyuanp/nerdtree-git-plugin'                                          " To see new or modified files in the nerdtree window
 Plug 'https://github.com/editorconfig/editorconfig-vim'                     " Support of '.editorconfig' files
 Plug 'shmargum/vim-sass-colors'                                             " Highlight sass/scss/less/css colors and color variables
-Plug 'vim-syntastic/syntastic'                                              " Syntax checking (linting)
 " Auto completion
 Plug 'neoclide/coc.nvim', {'branch': 'release'}
 Plug 'pappasam/coc-jedi', { 'do': 'yarn install --frozen-lockfile && yarn build' }      "Python, using jedi
@@ -118,6 +117,8 @@ au FileType json set shiftwidth=2
 autocmd FileType html set tabstop=2
 autocmd FileType html set softtabstop=2
 autocmd FileType html set shiftwidth=2
+au FileType xml setlocal foldmethod=indent
+autocmd FileType xml set foldlevel=2
 
 " XML 
 let g:xml_syntax_folding=3
@@ -154,24 +155,6 @@ nnoremap <C-h> :call pandoc#formatting#UseHardWraps()
 nnoremap <C-t> :call pandoc#formatting#ToggleAutoformat()
 let g:mkdp_filetypes = ['markdown', 'pandoc', 'pandoc.markdown']
 
-" #########################################
-" #########################################
-" Linters (syntastic configuration)
-"
-" SCSS linter
-let g:syntastic_scss_checkers = ['scss_lint']
-
-" Python linters. I define this list mainly to avoid pylint which I can't
-" manage to use correctly and is required on my main OS.
-let g:syntastic_python_checkers=['flake8', 'pep8', 'pycodestyle', 'pyflakes']
-
-" Copy pasting of the basic configuration recommended by syntastic
-" https://github.com/vim-syntastic/syntastic#settings
-" but without the statusline settings to improve comptability with airline.
-let g:syntastic_always_populate_loc_list = 1
-let g:syntastic_auto_loc_list = 1
-let g:syntastic_check_on_open = 1
-
 " #########################################
 " #########################################
 " autocompletion, mainly coc configuration