Require precipitation timing in generated text

internal/generatedtext/today.go

@@ -3,8 +3,7 @@ package generatedtext
 type Today 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 ValidateToday(data []byte) (Today, []byte, error) {
@@ -16,7 +15,6 @@ func (t *Today) dayStyleFields() dayStyleFields {
 		Summary:             t.Summary,
 		ForecastDiscussion:  t.ForecastDiscussion,
 		PrecipitationTiming: t.PrecipitationTiming,
-		Confidence:          t.Confidence,
 	}
 }
 
@@ -24,5 +22,4 @@ func (t *Today) setDayStyleFields(fields dayStyleFields) {
 	t.Summary = fields.Summary
 	t.ForecastDiscussion = fields.ForecastDiscussion
 	t.PrecipitationTiming = fields.PrecipitationTiming
-	t.Confidence = fields.Confidence
 }