feat: launch async agent loop (#2658)

tests/integration_test_builtin_tools.py

@@ -13,7 +13,6 @@ from letta_client.types import ToolReturnMessage
 
 from letta.schemas.agent import AgentState
 from letta.schemas.llm_config import LLMConfig
-from letta.settings import settings
 
 # ------------------------------
 # Fixtures
@@ -54,10 +53,7 @@ def server_url() -> str:
         else:
             raise RuntimeError(f"Could not reach {url} within {timeout_seconds}s")
 
-    temp = settings.use_experimental
-    settings.use_experimental = True
     yield url
-    settings.use_experimental = temp
 
 
 @pytest.fixture(scope="module")