remove dysfunctional deployment hook

config/deploy.rb.SAMPLE

@@ -42,14 +42,6 @@ namespace :deploy do
 
   after :restart, 'resque:restart'
 
-  after :restart, :clear_cache do
-    on roles(:web), in: :groups, limit: 3, wait: 10 do
-      within release_path do
-        execute :rake, 'cache:clear'
-      end
-    end
-  end
-
   after :finishing, 'deploy:cleanup'
 
 end