refactor: remove 'on-air' widget and related functionality from dashboard

libs/workspace/dashboard/data-access/src/lib/dashboard-widget.model.ts

@@ -1,7 +1,6 @@
 export type DashboardWidgetType =
     | 'source-stats'
     | 'continue-watching'
-    | 'on-air'
     | 'recently-watched'
     | 'global-favorites';
 
@@ -76,15 +75,6 @@ export const DEFAULT_DASHBOARD_WIDGETS: DashboardWidgetConfig[] = [
         enabled: true,
         order: 2,
     },
-    {
-        id: 'on-air',
-        type: 'on-air',
-        title: 'On Air Now',
-        description: 'Live programs currently airing across your EPG channels.',
-        size: 'full',
-        enabled: true,
-        order: 3,
-    },
     {
         id: 'recently-watched',
         type: 'recently-watched',