Remove legacy code for format conversion

solar_relay/coverage.py

@@ -24,9 +24,6 @@ def _finite(value):
 
 def sample_coverage(sample):
     observed = milliseconds(sample["observed_at"])
-    if "history_interval" in sample:
-        # Cloud history has interval energy, but no cumulative meter or relay history.
-        return (sample["id"], sample["source_id"], observed, observed, 1, observed, 0, observed, 0)
     readings = sample.get("readings", {})
     result = [sample["id"], sample["source_id"], observed]
     for source, fields in [