diff --git a/metricflow-semantics/metricflow_semantics/time/time_spine_source.py b/metricflow-semantics/metricflow_semantics/time/time_spine_source.py
index 1195810460..ddc6e17534 100644
--- a/metricflow-semantics/metricflow_semantics/time/time_spine_source.py
+++ b/metricflow-semantics/metricflow_semantics/time/time_spine_source.py
@@ -76,12 +76,6 @@ def build_standard_time_spine_sources(
                     base_granularity=legacy_time_spine.grain,
                 )
 
-        # Sanity check: this should have been validated during manifest parsing.
-        if not time_spine_sources:
-            raise RuntimeError(
-                "At least one time spine must be configured to use the semantic layer, but none were found."
-            )
-
         return time_spine_sources
 
     @staticmethod