# File lib/chef/checksum_cache.rb, line 81
    def self.cleanup_checksum_cache
      Chef::Log.debug("Cleaning the checksum cache")
      if (Chef::Config[:cache_type].to_s == "BasicFile")
        all_cached_checksums.each do |cache_key, cksum_cache_file|
          unless valid_cached_checksums.include?(cache_key)
            remove_unused_checksum(cksum_cache_file)
          end
        end
      end
    end