chore: remove unused feature flag (#74460)

This commit removes the validateDashboardsOnSave feature flag that is currently not in use.
Closes #70022

pkg/services/featuremgmt/registry.go

@@ -104,13 +104,6 @@ var (
 			Stage:       FeatureStagePublicPreview,
 			Owner:       grafanaBackendPlatformSquad,
 		},
-		{
-			Name:            "validateDashboardsOnSave",
-			Description:     "Validate dashboard JSON POSTed to api/dashboards/db",
-			Stage:           FeatureStagePublicPreview,
-			RequiresRestart: true,
-			Owner:           grafanaAsCodeSquad,
-		},
 		{
 			Name:         "autoMigrateOldPanels",
 			Description:  "Migrate old angular panels to supported versions (graph, table-old, worldmap, etc)",

pkg/services/featuremgmt/toggles_gen.csv

@@ -14,7 +14,6 @@ correlations,preview,@grafana/explore-squad,false,false,false,false
 datasourceQueryMultiStatus,experimental,@grafana/plugins-platform-backend,false,false,false,false
 traceToMetrics,experimental,@grafana/observability-traces-and-profiling,false,false,false,true
 newDBLibrary,preview,@grafana/backend-platform,false,false,false,false
-validateDashboardsOnSave,preview,@grafana/grafana-as-code,false,false,true,false
 autoMigrateOldPanels,preview,@grafana/dataviz-squad,false,false,false,true
 disableAngular,preview,@grafana/dataviz-squad,false,false,false,true
 canvasPanelNesting,experimental,@grafana/dataviz-squad,false,false,false,true

pkg/services/featuremgmt/toggles_gen.go

@@ -67,10 +67,6 @@ const (
 	// Use jmoiron/sqlx rather than xorm for a few backend services
 	FlagNewDBLibrary = "newDBLibrary"
 
-	// FlagValidateDashboardsOnSave
-	// Validate dashboard JSON POSTed to api/dashboards/db
-	FlagValidateDashboardsOnSave = "validateDashboardsOnSave"
-
 	// FlagAutoMigrateOldPanels
 	// Migrate old angular panels to supported versions (graph, table-old, worldmap, etc)
 	FlagAutoMigrateOldPanels = "autoMigrateOldPanels"