Dashboard: Remove old panel code and leave only new panel design (#74196)

* delete PanelHeader

* PanelHeaderMenuItem is only used in PageHeader

* PanelHeaderCorner only used by PanelEditorTableView

* PanelHeaderMenuTrigger not used anywhere

* PanelHeaderMenuWrapperNew is PanelHeaderMenuWrapper, old one is deleted

* remove newPanelChromeUI from test

* delete feature flag newPanelChromeUI

* PanelHeaderMenuWrapperNew is PanelHeaderMenuWrapper, old one is deleted

pkg/services/featuremgmt/registry.go

@@ -196,14 +196,6 @@ var (
 			FrontendOnly: true,
 			Owner:        awsDatasourcesSquad,
 		},
-		{
-			Name:         "newPanelChromeUI",
-			Description:  "Show updated look and feel of grafana-ui PanelChrome: panel header, icons, and menu",
-			Stage:        FeatureStageGeneralAvailability,
-			FrontendOnly: true,
-			Expression:   "true", // enabled by default
-			Owner:        grafanaDashboardsSquad,
-		},
 		{
 			Name:        "showDashboardValidationWarnings",
 			Description: "Show warnings when dashboards do not validate against the schema",

pkg/services/featuremgmt/toggles_gen.csv

@@ -27,7 +27,6 @@ entityStore,experimental,@grafana/grafana-app-platform-squad,true,false,false,fa
 cloudWatchCrossAccountQuerying,GA,@grafana/aws-datasources,false,false,false,false
 redshiftAsyncQueryDataSupport,GA,@grafana/aws-datasources,false,false,false,false
 athenaAsyncQueryDataSupport,GA,@grafana/aws-datasources,false,false,false,true
-newPanelChromeUI,GA,@grafana/dashboards-squad,false,false,false,true
 showDashboardValidationWarnings,experimental,@grafana/dashboards-squad,false,false,false,false
 mysqlAnsiQuotes,experimental,@grafana/backend-platform,false,false,false,false
 accessControlOnCall,preview,@grafana/grafana-authnz-team,false,false,false,false

pkg/services/featuremgmt/toggles_gen.go

@@ -119,10 +119,6 @@ const (
 	// Enable async query data support for Athena
 	FlagAthenaAsyncQueryDataSupport = "athenaAsyncQueryDataSupport"
 
-	// FlagNewPanelChromeUI
-	// Show updated look and feel of grafana-ui PanelChrome: panel header, icons, and menu
-	FlagNewPanelChromeUI = "newPanelChromeUI"
-
 	// FlagShowDashboardValidationWarnings
 	// Show warnings when dashboards do not validate against the schema
 	FlagShowDashboardValidationWarnings = "showDashboardValidationWarnings"