cc core/server/http/test: cleanup logged string

commit_hash:3814dd1bc9584a3928b595aeaccc552b32f0c524

Author: lexeyo

core/functional_tests/graceful_shutdown/delaying_handler.hpp

@@ -21,7 +21,7 @@ class DelayingServerHandler final : public server::handlers::HttpHandlerBase {
         const auto& delay_arg = request.GetArg("delay");
         const auto delay = !delay_arg.empty() ? utils::StringToDuration(delay_arg) : std::chrono::milliseconds::zero();
         if (delay > std::chrono::milliseconds::zero()) {
-            LOG_INFO() << "Delaying response for " << delay << " ms";
+            LOG_INFO() << "Delaying response for " << delay;
             engine::InterruptibleSleepFor(delay);
         }
         return "OK";