Move ale highlight groups to fresh colorscheme

vimrc

@@ -66,10 +66,6 @@ let g:ale_sign_error = '▸'
 let g:ale_sign_warning = '▸'
 let g:ale_echo_msg_format = '[%linter%] %s (%code%)'
 let g:ale_linters = {'c': [], 'cpp': []}
-hi link ALEError SyntasticError
-hi link ALEWarning SyntasticWarning
-hi link ALEErrorSign SyntasticErrorSign
-hi link ALEWarningSign SyntasticWarningSign
 
 " git diff in the sign column
 Plug 'airblade/vim-gitgutter'