Remove boltz service and RTL integration

We use peerswap these days, and the build process for boltz was made
much more complicated at some point. Not worth upgrading for us.

site-cookbooks/kosmos-bitcoin/recipes/rtl.rb

@@ -46,12 +46,6 @@ rtl_config = {
   multiPassHashed: credentials["multiPassHashed"]
 }
 
-if node['boltz']
-  # TODO adapt for multi-node usage
-  rtl_config[:nodes][0][:Authentication][:boltzMacaroonPath] = "#{node['boltz']['boltz_dir']}/macaroons"
-  rtl_config[:nodes][0][:Settings][:boltzServerUrl] = "https://#{node['boltz']['rest_host']}:#{node['boltz']['rest_port']}"
-end
-
 git rtl_dir do
   user bitcoin_user
   group bitcoin_group