No warning about rcov each time a rake task is ran.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1747 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/tasks/testing.rake

@@ -42,5 +42,5 @@ begin
     end
   end
 rescue LoadError
-  puts 'Rcov is not available. Proceeding without...'
+  # rcov not available
 end