Remove RR instead of masking it

apps/web/playwright/e2e/crypto/history-sharing.spec.ts

@@ -61,11 +61,16 @@ test.describe("History sharing", function () {
             // Bob should now be able to decrypt the event
             await expect(bobPage.getByText("A message from Alice")).toBeVisible();
 
-            // Exclude message timestamps and RR avatars from the screenshot. Bob sometimes sees Alice's RR on the
+            // Mask message timestamps and exclude RR avatars from the screenshot. Bob sometimes sees Alice's RR on the
             // previous event, which is surprising but not what we're testing here.
-            const mask = [bobPage.locator(".mx_MessageTimestamp"), bobPage.locator(".mx_ReadReceiptGroup_container")];
+            const mask = [bobPage.locator(".mx_MessageTimestamp")];
             await expect(bobPage.locator(".mx_RoomView_body")).toMatchScreenshot("shared-history-invite-accepted.png", {
                 mask,
+                css: `
+                    .mx_ReadReceiptGroup_container {
+                        display: none !important;
+                    }
+                `,
             });
         },
     );