revert: drop in-tree WidgetPermissionCustomisations (handled by plugin)

HealthChat's preapproveCapabilities customisation returned undefined for
non-HealthChat widgets, which short-circuits master's reworked
validateCapabilities flow (it falls back to the customisation whenever it
is defined). The api.healthchat.ch auto-approval is handled by the plugin,
so restore the empty upstream customisations object.

apps/web/src/customisations/WidgetPermissions.ts

@@ -13,18 +13,4 @@ import type { WidgetPermissionsCustomisations } from "@element-hq/element-web-mo
 
 // A real customisation module will define and export one or more of the
 // customisation points that make up the interface above.
-export const WidgetPermissionCustomisations: WidgetPermissionsCustomisations<Widget, Capability> = {
-    // Automatically approve all capabilities for widgets from api.healthchat.ch domain
-    preapproveCapabilities: async (
-        widget: Widget,
-        requestedCapabilities: Set<Capability>,
-    ): Promise<Set<Capability>> => {
-        // Check if the widget URL contains api.healthchat.ch
-        if (widget.templateUrl?.includes("api.healthchat.ch")) {
-            // Return all requested capabilities as approved
-            return new Set(requestedCapabilities);
-        }
-        // Return undefined to fall back to default behavior for other widgets
-        return undefined as any;
-    },
-};
+export const WidgetPermissionCustomisations: WidgetPermissionsCustomisations<Widget, Capability> = {};