Revert "[Hub|tracing] Tag hub prompts" (#14735)

Reverts langchain-ai/langchain#14720

libs/langchain/langchain/hub.py

@@ -5,7 +5,6 @@ from typing import TYPE_CHECKING, Any, Optional
 
 from langchain_core.load.dump import dumps
 from langchain_core.load.load import loads
-from langchain_core.runnables import Runnable
 
 if TYPE_CHECKING:
     from langchainhub import Client
@@ -79,7 +78,4 @@ def pull(
     """
     client = _get_client(api_url=api_url, api_key=api_key)
     resp: str = client.pull(owner_repo_commit)
-    loaded = loads(resp)
+    return loads(resp)
-    if isinstance(loaded, Runnable):
-        return loaded.with_config(metadata={"hub_owner_repo_commit": owner_repo_commit})
-    return loaded

libs/langchain/tests/unit_tests/test_hub.py

@@ -1,61 +0,0 @@
-from typing import Any, List
-from unittest.mock import MagicMock, Mock, patch
-
-from langchain_core.load.dump import dumps
-from langchain_core.prompts import ChatPromptTemplate
-from langchain_core.runnables.base import RunnableBinding
-from langchain_core.tracers.base import BaseTracer
-from langchain_core.tracers.schemas import Run
-
-from langchain import hub
-
-
-class FakeTracer(BaseTracer):
-    """Fake tracer that records LangChain execution."""
-
-    def __init__(self) -> None:
-        """Initialize the tracer."""
-        super().__init__()
-        self.runs: List[Run] = []
-
-    def _persist_run(self, run: Run) -> None:
-        """Persist a run."""
-        self.runs.append(run)
-
-
-repo_dict = {
-    "wfh/my-prompt-1": ChatPromptTemplate.from_messages(
-        [("system", "a"), ("user", "1")]
-    ),
-    "wfh/my-random-object": {"Hi": "there"},
-}
-
-
-def repo_lookup(owner_repo_commit: str, **kwargs: Any) -> str:
-    return dumps(repo_dict[owner_repo_commit])
-
-
-@patch("langchain.hub._get_client")
-def test_hub_pull_metadata(mock_get_client: Mock) -> None:
-    mock_client = MagicMock()
-    mock_client.pull = repo_lookup
-    mock_get_client.return_value = mock_client
-    res = hub.pull("wfh/my-prompt-1")
-    assert isinstance(res, RunnableBinding)
-    tracer = FakeTracer()
-    result = res.invoke({}, {"callbacks": [tracer]})
-    assert result.messages[0].content == "a"
-    assert result.messages[1].content == "1"
-    assert len(tracer.runs) == 1
-    run = tracer.runs[0]
-    assert run.extra is not None
-    assert run.extra["metadata"]["hub_owner_repo_commit"] == "wfh/my-prompt-1"  # type: ignore
-
-
-@patch("langchain.hub._get_client")
-def test_hub_pull_random_object(mock_get_client: Mock) -> None:
-    mock_client = MagicMock()
-    mock_client.pull = repo_lookup
-    mock_get_client.return_value = mock_client
-    res = hub.pull("wfh/my-random-object")
-    assert res == {"Hi": "there"}