Revert "Set up key backup using non-deprecated APIs (#12005)" (#12102)

playwright/element-web-test.ts

@@ -293,7 +293,3 @@ export const expect = baseExpect.extend({
         return { pass: true, message: () => "", name: "toMatchScreenshot" };
     },
 });
-
-test.use({
-    permissions: ["clipboard-read"],
-});