Revert "Add support for passing list of Message into LLM completion" (#10653)

openhands/agenthub/browsing_agent/browsing_agent.py

@@ -217,7 +217,7 @@ class BrowsingAgent(Agent):
         messages.append(Message(role='user', content=[TextContent(text=prompt)]))
 
         response = self.llm.completion(
-            messages=messages,
+            messages=self.llm.format_messages_for_llm(messages),
             stop=[')```', ')\n```'],
         )
         return self.response_parser.parse(response)

openhands/agenthub/codeact_agent/codeact_agent.py

@@ -204,7 +204,7 @@ class CodeActAgent(Agent):
         initial_user_message = self._get_initial_user_message(state.history)
         messages = self._get_messages(condensed_history, initial_user_message)
         params: dict = {
-            'messages': messages,
+            'messages': self.llm.format_messages_for_llm(messages),
         }
         params['tools'] = check_tools(self.tools, self.llm.config)
         params['extra_body'] = {

openhands/agenthub/visualbrowsing_agent/visualbrowsing_agent.py

@@ -301,8 +301,10 @@ You are an agent trying to solve a web task based on the content of the page and
         messages.append(Message(role='system', content=[TextContent(text=system_msg)]))
         messages.append(Message(role='user', content=human_prompt))
 
+        flat_messages = self.llm.format_messages_for_llm(messages)
+
         response = self.llm.completion(
-            messages=messages,
+            messages=flat_messages,
             temperature=0.0,
             stop=[')```', ')\n```'],
         )