remove_hook (Rcov::DifferentialAnalyzer)

    # File lib/rcov.rb, line 418
      def remove_hook
        @@mutex.synchronize do
          self.class.hook_level -= 1
          Rcov::RCOV__.send(@remove_hook_meth) if self.class.hook_level == 0
        end
        @end_raw_data = raw_data_absolute
        @cache_state = :done
        # force computation of the stats for the traced code in this run;
        # we cannot simply let it be if self.class.hook_level == 0 because
        # some other analyzer could install a hook, causing the raw_data_absolute
        # to change again.
        # TODO: lazy computation of raw_data_relative, only when the hook gets
        # activated again.
        raw_data_relative
      end