Dashboards: Do not show alert rules button for new dashboads

public/app/features/alerting/unified/initAlerting.tsx

@@ -22,7 +22,7 @@ export function initAlerting() {
       component: ({ dashboard }) =>
         alertingEnabled ? (
           <Suspense fallback={null} key="alert-rules-button">
-            {dashboard && <AlertRulesToolbarButton dashboardUid={dashboard.uid} />}
+            {dashboard && dashboard.uid && <AlertRulesToolbarButton dashboardUid={dashboard.uid} />}
           </Suspense>
         ) : null,
       index: -2,

public/app/features/dashboard-scene/edit-pane/DashboardEditPaneRenderer.tsx

@@ -76,12 +76,6 @@ export function DashboardEditPaneRenderer({ editPane, dashboard, isDocked }: Pro
               data-testid={selectors.pages.Dashboard.Sidebar.optionsButton}
               active={selectedObject === dashboard ? true : false}
             />
-            {/* <Sidebar.Button
-              tooltip={t('dashboard.sidebar.edit-schema.tooltip', 'Edit as code')}
-              title={t('dashboard.sidebar.edit-schema.title', 'Code')}
-              icon="brackets-curly"
-              onClick={() => dashboard.openV2SchemaEditor()}
-            /> */}
             <Sidebar.Divider />
           </>
         )}