fix(highlite): highlight groups being cleared

This was a step I took from the plugin this colorscheme is forked from
(romainl/vim-rnb) but it turns out that it causes problems and doesn't
actually solve anything.

Taking out this line fixed a highlight group being cleared when it
should not have been, although interestingly not _all_ highlight groups
are being cleared consistently. So its just introducing inconsistency
into this plugin which I do not want.

SEE glepnir/galaxyline.nvim#88

lua/highlite.lua

@@ -178,9 +178,6 @@ return setmetatable(highlite, {['__call'] = function(self, normal, highlights, t
 	-- save the colors_name before syntax reset
 	local color_name = vim.g.colors_name
 
-	-- Clear the highlighting.
-	exe 'hi clear'
-
 	-- If the syntax has been enabled, reset it.
 	if fn.exists 'syntax_on' then exe 'syntax reset' end