Remove redundant alert text from the data package

internal/briefing/metadata_module.go

@@ -20,7 +20,6 @@ type MetadataModule struct {
 	ValidPeriod    timeutil.Period        `json:"valid_period"`
 	Location       *LocationContext       `json:"location,omitempty"`
 	SourceWarnings []SourceWarningSummary `json:"source_warnings,omitempty"`
-	Alerts         *AlertDigestModule     `json:"alerts,omitempty"`
 }
 
 type SourceWarningSummary struct {
@@ -44,7 +43,6 @@ func buildMetadataModule(ctx ModuleContext, _ any) (*module.Output, error) {
 		ValidPeriod:    metadata.ValidPeriod,
 		Location:       copyLocation(ctx.Location),
 		SourceWarnings: sourceWarningSummaries(ctx.Collected.SourceWarnings),
-		Alerts:         alertDigest(ctx.Collected, ctx.Derived.AlertOverlaps, ctx.Timezone),
 	}
 	return &module.Output{ID: module.Metadata, StanzaName: "metadata", Value: value}, nil
 }