Revert "added colours to qf extension to distinguish quickfix and location list (#933)" (#1118)

This reverts commit 9170434aa1.

lua/lualine/extensions/quickfix.lua

@@ -16,11 +16,6 @@ local function title()
   return vim.fn.getqflist({ title = 0 }).title
 end
 
-local qf_colours = {
-  ll = vim.api.nvim_get_hl_by_name('Constant', false).foreground,
-  qf = vim.api.nvim_get_hl_by_name('Identifier', false).foreground,
-}
-
 local M = {}
 
 function M.init()
@@ -29,14 +24,7 @@ function M.init()
 end
 
 M.sections = {
-  lualine_a = {
-    {
-      label,
-      color = function()
-        return is_loclist() and { bg = qf_colours['ll'] } or { bg = qf_colours['qf'] }
-      end,
-    },
-  },
+  lualine_a = { label },
   lualine_b = { title },
   lualine_z = { 'location' },
 }