Stop running "rake assets:clean" when precompiling assets

Vite does not support assets:clean anymore.

See ElMassimo/vite_ruby@824b4ef

Author: nertzy

lib/stairstep/deploy.rb

@@ -50,7 +50,6 @@ def prepare_commit(ref_name)
 
   def precompile
     executor.execute!({"RAILS_ENV" => "production"}, "bundle", "exec", "rake", "assets:precompile", message: "Precompiling assets")
-    executor.execute!({"RAILS_ENV" => "production"}, "bundle", "exec", "rake", "assets:clean", message: "Cleaning outdated assets")
   end
 
   def bundle(ref_name)