Remove unneeded TODO (dbt-labs#10568)

core/dbt/contracts/graph/semantic_manifest.py

@@ -155,7 +155,7 @@ def _get_pydantic_semantic_manifest(self) -> PydanticSemanticManifest:
                 raise ParsingError(
                     "The semantic layer requires a time spine model with granularity DAY or smaller in the project, "
                     "but none was found. Guidance on creating this model can be found on our docs site "
-                    "(https://docs.getdbt.com/docs/build/metricflow-time-spine)."  # TODO: update docs link when available!
+                    "(https://docs.getdbt.com/docs/build/metricflow-time-spine)."
                 )
 
             # For backward compatibility: if legacy time spine exists, include it in the manifest.