assistant: Remove unused flag for text query with context

Remove unused code related to kEnableTextQueriesWithClientDiscourseContext.

Bug: b/145218971
Test: manual
Change-Id: Iceb7a5be8f0d95939542637fd17ebf2ac1648569
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2080819Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Commit-Queue: Tao Wu <wutao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#746586}

chromeos/services/assistant/assistant_manager_service_impl.cc

@@ -546,23 +546,9 @@ void AssistantManagerServiceImpl::StartTextInteraction(
   options.conversation_turn_id = NewPendingInteraction(
       mojom::AssistantInteractionType::kText, source, query);
 
-  if (base::FeatureList::IsEnabled(
-          assistant::features::kEnableTextQueriesWithClientDiscourseContext) &&
-      assistant_extra_ && assistant_tree_) {
-    // We don't send the screenshot, because the backend only needs the
-    // view hierarchy to resolve contextual queries such as "Who is he?".
-    assistant_manager_internal_->SendTextQueryWithClientDiscourseContext(
-        query,
-        CreateContextProto(
-            AssistantBundle{assistant_extra_.get(), assistant_tree_.get()},
-            is_first_client_discourse_context_query_),
-        options);
-    is_first_client_discourse_context_query_ = false;
-  } else {
-    std::string interaction = CreateTextQueryInteraction(query);
-    assistant_manager_internal_->SendVoicelessInteraction(
-        interaction, /*description=*/"text_query", options, [](auto) {});
-  }
+  std::string interaction = CreateTextQueryInteraction(query);
+  assistant_manager_internal_->SendVoicelessInteraction(
+      interaction, /*description=*/"text_query", options, [](auto) {});
 }
 
 void AssistantManagerServiceImpl::AddAssistantInteractionSubscriber(
@@ -1492,7 +1478,6 @@ void AssistantManagerServiceImpl::ClearScreenContextCache() {
   assistant_extra_.reset();
   assistant_tree_.reset();
   assistant_screenshot_.clear();
-  is_first_client_discourse_context_query_ = true;
 }
 
 void AssistantManagerServiceImpl::OnAccessibilityStatusChanged(

chromeos/services/assistant/assistant_manager_service_impl.h

@@ -372,8 +372,6 @@ class COMPONENT_EXPORT(ASSISTANT_SERVICE) AssistantManagerServiceImpl
   bool receive_inline_response_ = false;
   std::string receive_url_response_;
 
-  bool is_first_client_discourse_context_query_ = true;
-
   mojo::Receiver<media_session::mojom::MediaControllerObserver>
       media_controller_observer_receiver_{this};
 

chromeos/services/assistant/public/features.cc

@@ -91,10 +91,6 @@ const base::Feature kEnableDspHotword{"EnableDspHotword",
 const base::Feature kEnableStereoAudioInput{"AssistantEnableStereoAudioInput",
                                             base::FEATURE_DISABLED_BY_DEFAULT};
 
-const base::Feature kEnableTextQueriesWithClientDiscourseContext{
-    "AssistantEnableTextQueriesWithClientDiscourseContext",
-    base::FEATURE_DISABLED_BY_DEFAULT};
-
 const base::Feature kEnablePowerManager{"ChromeOSAssistantEnablePowerManager",
                                         base::FEATURE_DISABLED_BY_DEFAULT};
 

chromeos/services/assistant/public/features.h

@@ -81,10 +81,6 @@ extern const base::Feature kEnableStereoAudioInput;
 COMPONENT_EXPORT(ASSISTANT_SERVICE_PUBLIC)
 extern const base::Feature kEnablePowerManager;
 
-// Enables sending the client discourse context with text queries.
-COMPONENT_EXPORT(ASSISTANT_SERVICE_PUBLIC)
-extern const base::Feature kEnableTextQueriesWithClientDiscourseContext;
-
 COMPONENT_EXPORT(ASSISTANT_SERVICE_PUBLIC)
 int GetProactiveSuggestionsMaxWidth();