diff --git a/autogpt/json_utils/utilities.py b/autogpt/json_utils/utilities.py
index 01848871..e492d302 100644
--- a/autogpt/json_utils/utilities.py
+++ b/autogpt/json_utils/utilities.py
@@ -67,29 +67,3 @@ def validate_json(
     logger.debug("The JSON object is valid.")
 
     return True
-
-
-def validate_json_string(json_string: str, schema_name: str) -> dict | None:
-    """
-    :type schema_name: object
-    :param schema_name: str
-    :type json_object: object
-    """
-
-    try:
-        json_loaded = json.loads(json_string)
-        if not validate_json(json_loaded, schema_name):
-            return None
-        return json_loaded
-    except:
-        return None
-
-
-def is_string_valid_json(json_string: str, schema_name: str) -> bool:
-    """
-    :type schema_name: object
-    :param schema_name: str
-    :type json_object: object
-    """
-
-    return validate_json_string(json_string, schema_name) is not None
diff --git a/autogpt/memory/message_history.py b/autogpt/memory/message_history.py
index be524125..897cee15 100644
--- a/autogpt/memory/message_history.py
+++ b/autogpt/memory/message_history.py
@@ -9,11 +9,7 @@ if TYPE_CHECKING:
     from autogpt.agent import Agent
 
 from autogpt.config import Config
-from autogpt.json_utils.utilities import (
-    LLM_DEFAULT_RESPONSE_FORMAT,
-    extract_json_from_response,
-    is_string_valid_json,
-)
+from autogpt.json_utils.utilities import extract_json_from_response
 from autogpt.llm.base import ChatSequence, Message, MessageRole, MessageType
 from autogpt.llm.providers.openai import OPEN_AI_CHAT_MODELS
 from autogpt.llm.utils import count_string_tokens, create_chat_completion
@@ -105,8 +101,8 @@ class MessageHistory:
             )
             result_message = messages[i + 1]
             try:
-                assert is_string_valid_json(
-                    ai_message.content, LLM_DEFAULT_RESPONSE_FORMAT
+                assert (
+                    extract_json_from_response(ai_message.content) != {}
                 ), "AI response is not a valid JSON object"
                 assert result_message.type == "action_result"