puppeteer: Stop looking for tab-pane elements.
puppeteer: Stop looking for tab-pane elements.

These haven't been a part of Zulip's navigation in several years, so
it's just a reference to a useless extra CSS class.

zulip/zulip,zulip/zulip,zulip/zulip,zulip/zulip,zulip/zulip,zulip/zulip,zulip/zulip