Cleanup remaining references to max mode (#33509)

Release Notes:

- N/A

crates/agent_ui/src/agent_ui.rs

@@ -4,6 +4,7 @@ mod agent_diff;
 mod agent_model_selector;
 mod agent_panel;
 mod buffer_codegen;
+mod burn_mode_tooltip;
 mod context_picker;
 mod context_server_configuration;
 mod context_strip;
@@ -11,7 +12,6 @@ mod debug;
 mod inline_assistant;
 mod inline_prompt_editor;
 mod language_model_selector;
-mod max_mode_tooltip;
 mod message_editor;
 mod profile_selector;
 mod slash_command;