remove DashNav barrel file

eslint-suppressions.json

@@ -2403,11 +2403,6 @@
       "count": 1
     }
   },
-  "public/app/features/dashboard/components/DashNav/index.ts": {
-    "no-barrel-files/no-barrel-files": {
-      "count": 1
-    }
-  },
   "public/app/features/dashboard/components/DashboardPrompt/DashboardPrompt.test.tsx": {
     "@typescript-eslint/no-explicit-any": {
       "count": 1

public/app/features/dashboard/components/DashNav/index.ts

@@ -1,2 +0,0 @@
-import DashNav from './DashNav';
-export { DashNav };

public/app/features/dashboard/containers/DashboardPage.tsx

@@ -23,7 +23,7 @@ import { StoreState } from 'app/types/store';
 
 import { cancelVariables, templateVarsChangedInUrl } from '../../variables/state/actions';
 import { findTemplateVarChanges } from '../../variables/utils';
-import { DashNav } from '../components/DashNav';
+import DashNav from '../components/DashNav/DashNav';
 import { DashboardLoading } from '../components/DashboardLoading/DashboardLoading';
 import { DashboardPrompt } from '../components/DashboardPrompt/DashboardPrompt';
 import { DashboardSettings } from '../components/DashboardSettings';