Dashboard: Remove super old prop that has not been used in years (#50826)

public/app/features/dashboard/components/SaveDashboard/forms/SaveDashboardAsForm.test.tsx

@@ -66,7 +66,6 @@ describe('SaveDashboardAsForm', () => {
       expect(savedDashboardModel.id).toBe(null);
       expect(savedDashboardModel.title).toBe('name');
       expect(savedDashboardModel.editable).toBe(true);
-      expect(savedDashboardModel.hideControls).toBe(false);
     });
 
     it("appends 'Copy' to the name when the dashboard isnt new", async () => {

public/app/features/dashboard/components/SaveDashboard/forms/SaveDashboardAsForm.tsx

@@ -19,7 +19,6 @@ const getSaveAsDashboardClone = (dashboard: DashboardModel) => {
   clone.uid = '';
   clone.title += ' Copy';
   clone.editable = true;
-  clone.hideControls = false;
 
   // remove alerts if source dashboard is already persisted
   // do not want to create alert dupes

public/app/features/dashboard/components/VersionHistory/__mocks__/dashboardHistoryMocks.ts

@@ -72,7 +72,6 @@ export function restore(version: any, restoredFrom?: any): any {
         editable: true,
         gnetId: null,
         graphTooltip: 0,
-        hideControls: false,
         id: 1,
         links: [],
         restoredFrom: restoredFrom,