Require precipitation timing in generated text

internal/generatedtext/daily.go

@@ -3,8 +3,7 @@ package generatedtext
 type Daily struct {
 	Summary             string   `json:"summary"`
 	ForecastDiscussion  []string `json:"forecast_discussion"`
-	PrecipitationTiming string   `json:"precipitation_timing,omitempty"`
-	Confidence          string   `json:"confidence,omitempty"`
+	PrecipitationTiming string   `json:"precipitation_timing"`
 }
 
 func ValidateDaily(data []byte) (Daily, []byte, error) {
@@ -16,7 +15,6 @@ func (d *Daily) dayStyleFields() dayStyleFields {
 		Summary:             d.Summary,
 		ForecastDiscussion:  d.ForecastDiscussion,
 		PrecipitationTiming: d.PrecipitationTiming,
-		Confidence:          d.Confidence,
 	}
 }
 
@@ -24,5 +22,4 @@ func (d *Daily) setDayStyleFields(fields dayStyleFields) {
 	d.Summary = fields.Summary
 	d.ForecastDiscussion = fields.ForecastDiscussion
 	d.PrecipitationTiming = fields.PrecipitationTiming
-	d.Confidence = fields.Confidence
 }