chore: remove orphaned website revenuecat-link test

website/ was moved to its own repo in #407, but this test was left behind
referencing the deleted website/assets/js/revenuecat-link.js, so the suite
fails to load. Remove the dead test (the code it covered now lives elsewhere).

Co-Authored-By: Dishit Karia <hanmadishit74@gmail.com>

Author: dishit-wednesday