Remove obsolete dcheck in Assistant service

Bug: b/112447220
Test: Manual Test
Change-Id: Idcab08aca234f9f5528529aedb71fbbbdfa29d1d
Reviewed-on: https://chromium-review.googlesource.com/1171551Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Commit-Queue: Yue Li <updowndota@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582335}

chromeos/services/assistant/service.cc

@@ -98,11 +98,7 @@ void Service::OnBindInterface(
 }
 
 void Service::BindAssistantConnection(mojom::AssistantRequest request) {
-  // Assistant interface is supposed to be used when UI is actually in
-  // use, which should be way later than assistant is created.
   DCHECK(assistant_manager_service_);
-  DCHECK(assistant_manager_service_->GetState() ==
-         AssistantManagerService::State::RUNNING);
   bindings_.AddBinding(assistant_manager_service_.get(), std::move(request));
 }