refactor: label suggestion service

lib/captain/label_suggestion_service.rb

@@ -5,7 +5,7 @@ class Captain::LabelSuggestionService < Captain::BaseEditorService
     payload = label_suggestion_body
     return nil if payload.blank?
 
-    response = make_api_call(label_suggestion_body)
+    response = make_api_call(payload)
     return response if response[:error].present?
 
     # LLMs are not deterministic - sometimes response includes "Labels:" prefix
@@ -59,11 +59,6 @@ class Captain::LabelSuggestionService < Captain::BaseEditorService
     true
   end
 
-  def conversation_messages(in_array_format: false)
-    messages = init_messages_body(in_array_format)
-    add_messages_until_token_limit(conversation, messages, in_array_format)
-  end
-
   def init_messages_body(in_array_format)
     in_array_format ? [] : ''
   end