Remove dormant forecast comparison policy

internal/config/config.go

@@ -30,7 +30,6 @@ type Config struct {
 	Promptkit     PromptkitConfig         `yaml:"promptkit"`
 	Workspace     WorkspaceConfig         `yaml:"workspace"`
 	Dayparts      []DaypartConfig         `yaml:"dayparts"`
-	RecentChange  RecentChangeConfig      `yaml:"recent_change"`
 	Reports       map[string]ReportConfig `yaml:"reports"`
 }
 
@@ -109,13 +108,6 @@ type DaypartConfig struct {
 	End   string `yaml:"end"`
 }
 
-type RecentChangeConfig struct {
-	TemperatureDegrees       float64 `yaml:"temperature_degrees"`
-	PrecipProbabilityPoints  int     `yaml:"precip_probability_points"`
-	WindGustMilesPerHour     int     `yaml:"wind_gust_miles_per_hour"`
-	PrecipTimingShiftMinutes int     `yaml:"precip_timing_shift_minutes"`
-}
-
 type ReportConfig struct {
 	DeterministicModules    []ModuleConfigItem      `yaml:"deterministic_modules"`
 	Distributor             ReportDistributorConfig `yaml:"distributor"`

internal/config/config_test.go

@@ -165,6 +165,13 @@ func TestLoadRejectsRetiredExecutionConfiguration(t *testing.T) {
 	}
 }
 
+func TestLoadRejectsRemovedRecentChangeConfiguration(t *testing.T) {
+	_, err := LoadFile(writeConfig(t, "recent_change:\n  temperature_degrees: 5\n"))
+	if err == nil || !strings.Contains(err.Error(), "recent_change") {
+		t.Fatalf("LoadFile() error = %v, want removed configuration rejection", err)
+	}
+}
+
 func TestLoadReportModuleOverrides(t *testing.T) {
 	path := writeConfig(t, `
 reports:

internal/config/defaults.go

@@ -64,12 +64,6 @@ func Defaults() Config {
 			{Name: "afternoon", Start: "15:00", End: "17:00"},
 			{Name: "evening", Start: "17:00", End: "24:00"},
 		},
-		RecentChange: RecentChangeConfig{
-			TemperatureDegrees:       5,
-			PrecipProbabilityPoints:  20,
-			WindGustMilesPerHour:     10,
-			PrecipTimingShiftMinutes: 120,
-		},
 		Reports: map[string]ReportConfig{},
 	}
 }

internal/config/load.go

@@ -1,6 +1,7 @@
 package config
 
 import (
+	"bytes"
 	"errors"
 	"fmt"
 	"os"
@@ -62,7 +63,9 @@ func mergeFile(cfg *Config, path string) error {
 	if err := rejectRetiredExecutionConfig(data); err != nil {
 		return fmt.Errorf("parse config %q: %w", path, err)
 	}
-	if err := yaml.Unmarshal(data, cfg); err != nil {
+	decoder := yaml.NewDecoder(bytes.NewReader(data))
+	decoder.KnownFields(true)
+	if err := decoder.Decode(cfg); err != nil {
 		return fmt.Errorf("parse config %q: %w", path, err)
 	}
 	if cfg.MissingSource.Sources == nil {