remove unnecessary langsmith constraint

Author: VegetarianOrc

pyproject.toml

@@ -71,9 +71,6 @@ cloud-export-to-parquet = [
 
 [tool.uv]
 constraint-dependencies = [
-    # langsmith 0.7.34 changed its aio_to_thread signature; temporalio.contrib.langsmith
-    # 1.27.2 still patches the older signature, causing workflow task retries to hang CI.
-    "langsmith>=0.7.34,<0.9",
     # yarl 1.24.0 was published without an sdist and only has cp310 wheels, so it cannot
     # install on the Python 3.14 CI jobs.
     "yarl!=1.24.0",