Revert "Move region check to base_install"

This reverts commit 693654a.

Author: demartinofra

recipes/base_install.rb

@@ -51,13 +51,6 @@
   end
 end
 
-# AWS CLI China Mirror
-if node['cfncluster']['cfn_region'].start_with?("cn-")
-  node.default['cfncluster']['awscli']['url'] = "https://s3.cn-north-1.amazonaws.com.cn/cn-north-1-aws-parallelcluster/aws-cli/awscli-bundle.zip"
-else
-  node.default['cfncluster']['awscli']['url'] = "https://s3.amazonaws.com/aws-cli/awscli-bundle.zip"
-end
-
 bash "install awscli" do
   cwd Chef::Config[:file_cache_path]
   code <<-CLI