Fix search on non homepage pages

On non-hompage page, rails helper check this config and updated the path to include nesting.

This is related to alphagov/tech-docs-gem#291

and since we deploy to root, these can be removed

Author: kr8n3r

config.rb

@@ -4,9 +4,6 @@
 activate :directory_indexes
 page '/google*.html', directory_index: false
 
-activate :relative_assets
-set :relative_links, true
-
 after_build do |builder|
   begin
     HTMLProofer.check_directory(config[:build_dir], {