chore: removed deprecated property

Signed-off-by: blam <ben@blam.sh>

packages/frontend-app-api/api-report.md

@@ -6,7 +6,6 @@
 import { ConfigApi } from '@backstage/core-plugin-api';
 import { ExternalRouteRef } from '@backstage/frontend-plugin-api';
 import { FrontendFeature } from '@backstage/frontend-plugin-api';
-import { IconComponent } from '@backstage/core-plugin-api';
 import { JSX as JSX_2 } from 'react';
 import { ReactNode } from 'react';
 import { RouteRef } from '@backstage/frontend-plugin-api';
@@ -14,9 +13,6 @@ import { SubRouteRef } from '@backstage/frontend-plugin-api';
 
 // @public (undocumented)
 export function createApp(options?: {
-  icons?: {
-    [key in string]: IconComponent;
-  };
   features?: (FrontendFeature | CreateAppFeatureLoader)[];
   configLoader?: () => Promise<{
     config: ConfigApi;
@@ -50,9 +46,6 @@ export type CreateAppRouteBinder = <
 
 // @public
 export function createSpecializedApp(options?: {
-  icons?: {
-    [key in string]: IconComponent;
-  };
   features?: FrontendFeature[];
   config?: ConfigApi;
   bindRoutes?(context: { bind: CreateAppRouteBinder }): void;